Hotel Los Corales
Location: Carretera Principal West End, Roatan, Bay Islands, 33132, Roatan, HN
Star Rating: 2 Stars
Property Type: Hotels
About this Property
Terrace with Stunning Views
Enjoy the breathtaking views from our terrace at Hotel Los Corales. With complimentary wireless internet access and concierge services available, your stay is sure to be both relaxing and convenient.
Convenient Amenities
Take advantage of our complimentary beach shuttle to easily access the surf and sand. Hungry? Visit our on-site grocery/convenience store for a quick bite. Additionally, our hotel offers practical services like dry cleaning/laundry, luggage storage, and a safe deposit box for your peace of mind.
Comfortable Rooms and Nearby Attractions
Relax in one of our 11 air-conditioned rooms with modern amenities. Each room features a private balcony or patio, minibar, and flat-screen TV. Explore nearby attractions like Half Moon Bay Beach and Roatán Marine Park, both just a short distance from the hotel.
Experience the perfect blend of comfort and convenience at Hotel Los Corales in Roatan. Book now for a memorable beach getaway!
Important Information
- One child 11 years old or younger stays free when occupying the parent or guardian's room, using existing bedding.
- Contactless check-out is available.
Policies
Check-in: 01:00 PM - 07:00 PM
Check-out: 11:00 AM
Instructions: This property offers transfers from the airport (surcharges may apply). To arrange pick-up, guests must contact the property 48 hours prior to arrival, using the contact information on the booking confirmation. The front desk is open daily from 7:00 AM - 7:00 PM. To make arrangements for check-in please contact the property ahead of time using the information on the booking confirmation. If you are planning to arrive after 7:00 PM please contact the property in advance using the information on the booking confirmation. Guests must contact the property in advance for check-in instructions. The front desk is staffed during limited hours.
Amenities & Facilities
- Free beach shuttle
- Free WiFi
- Terrace
- Luggage storage
- Concierge service
- Wheelchair accessible
- ATM/banking
- Snorkeling nearby
- Scuba diving nearby
- Safe-deposit box at front desk
- Front desk (limited hours)
- Smoke-free property
- Grocery/convenience store
- Tours/ticket assistance
- Free self parking
- Airport transportation - pickup (surcharge)
- Free beach shuttle
- Shared microwave
- Mosquito nets
- Horse riding nearby
- Upper floors accessible by stairs only
Rooms Available
-
Economy Double or Twin Room
This air-conditioned twin/double room includes a flat-screen TV with cable channels, a private bathroom as well as a patio. The unit offers 2 beds.
Max Occupancy: 2 (2 Adults)
- Shower
- TV
- Air conditioning
- Hair dryer
- Refrigerator
- Desk
- Toilet
- Private bathroom
- Additional toilet
- Private entrance
- Tile/marble floor
- Mosquito net
- Wardrobe or closet
- Linen
- Upper floors accessible by stairs only
- Clothes rack
- Toilet paper
- Trash cans
- Shampoo
- Conditioner
- Body soap
- Socket near the bed
- Fire extinguisher
- Single-room air conditioning for guest accommodation
- Hand sanitiser
-
Standard Plus Room
2 Queen Beds
248-sq-foot room with a balcony/patio
Internet - Free WiFi
Entertainment - 32-inch flat-screen TV with premium channels
Food & Drink - Minibar (fees may apply)
Sleep - Blackout drapes/curtains and bed sheets
Bathroom - Private bathroom, shower, free toiletries, and a hair dryer
Practical - Desk, local maps, and guidebooks
Comfort - Air conditioning and daily housekeeping
Non-Smoking
Room is accessed via exterior corridors
Max Occupancy: 4 (4 Adults)
- Minibar
- Shower
- TV
- Air conditioning
- Hair dryer
- Desk
- Private bathroom
- Daily housekeeping
- Access via exterior corridors
- Blackout drapes/curtains
- Free WiFi
- Balcony or patio
- Bedsheets provided
- Local maps
- Guidebooks or recommendations
- Restaurant dining guide
-
Value Room
2 Twin Beds
161-sq-foot room with a balcony/patio
Internet - Free WiFi
Entertainment - 32-inch flat-screen TV with premium channels
Food & Drink - Minibar (fees may apply)
Sleep - Blackout drapes/curtains and bed sheets
Bathroom - Private bathroom, shower, free toiletries, and a hair dryer
Practical - Desk, local maps, and guidebooks
Comfort - Air conditioning and daily housekeeping
Non-Smoking
Room is accessed via exterior corridors
Max Occupancy: 2 (2 Adults)
- Minibar
- Shower
- TV
- Air conditioning
- Hair dryer
- Desk
- Private bathroom
- Daily housekeeping
- Access via exterior corridors
- Blackout drapes/curtains
- Free WiFi
- Balcony or patio
- Bedsheets provided
- Local maps
- Guidebooks or recommendations
- Restaurant dining guide
-
Standard Room
1 Queen Bed
183-sq-foot room with a balcony/patio
Internet - Free WiFi
Entertainment - 32-inch flat-screen TV with premium channels
Food & Drink - Minibar (fees may apply)
Sleep - Blackout drapes/curtains and bed sheets
Bathroom - Private bathroom, shower, free toiletries, and a hair dryer
Practical - Desk, local maps, and guidebooks
Comfort - Air conditioning and daily housekeeping
Non-Smoking
Room is accessed via exterior corridors
Max Occupancy: 2 (2 Adults)
- Minibar
- Shower
- TV
- Air conditioning
- Hair dryer
- Desk
- Private bathroom
- Daily housekeeping
- Access via exterior corridors
- Blackout drapes/curtains
- Free WiFi
- Balcony or patio
- Bedsheets provided
- Local maps
- Guidebooks or recommendations
- Restaurant dining guide
Guest Reviews
- Marcus (1/5): I would recommend elsewhere - Was charged extra for a lost key Not very friendly
- Angelique (8/5): Great - Location and the price Stairs lol
- Kevin (8/5): Great Value, nice property, good location -
- Ever Jonatan Acosta (10/5): -
- Vicki (9/5): I very much liked the property - Stairs, road noise
- Edwin (7/5): - Ubicación Que no hay personal, ni línea de emergencia después de las 8pm..ni personal de seguridad en el hotel.
- Christine (8/5): Quick - The location is centralized but load It’s great great motel when you don’t plan to stay to relaxe because it’s on the Main Street therefore lots of noise. But it well located to do activities
- Mike (10/5): -
- David (8/5): -
- Toni (9/5): - Personal muy amable, a 5 minutos de la playa caminando.
- Sinthia (10/5): -
- Chad (10/5): - Very comfortable, no problems whatsoever. Staff was friendly, very helpful, and readily available. Hotel offers bookings to various activities, laundry services, and lots of other things to make the trip enjoyable. Would definitely stay again.
- Barrios (9/5): - La amabilidad de la recepcionista y la confianza que nos generó. Que tuviera agua caliente en la ducha y poco ventilación en el sanitario.
- Marina (10/5): - Great please
- Davy (10/5): - Everything was great location is very convenient and close to the beach in west end
- George (4/5): - Did not like it at all,4 set of long steps to get to your room,poor shower and staff lives at 8 pm...also expensive to get to from the airport
- Okashi (9/5): Precio razonable por la ubicación y las habitaciones. - Buena ubicación, no probe los desayunos Las gradas hacia la habitación
- Kira (10/5): - Very nice property, it’s kind of on a Main Street (I guess) so you hear a little bit more of the scooters at night but everyone is usually in by 12/1 am. I felt safe. It was about a 5-7 minute walk uphill (not bad at all) to west bay beach. I loved it, and will be revisiting
- michaelmE1072AD (10/5): Birthday beach trip - When I was looking at hotel for my birthday trip to Roatan I came across this hotel and I booked it I have to say it was a great hotel from the first night stay to my last night stay . When I checked in the front desk agent Larissa was professional and friendly upon my check in. After check in Larissa walked me around to my room made sure everything was in order. Also Larissa was able to recommend restaurants and things to do on the island. The room was clean the shower worked hot water was good and plentiful. Larissa also informed me there sister hotel had a hotel shuttle that came every morning. So that helpful as it was on the beach. Very nice views from the floor. Also a shout out to Rosalina the housekeeper she kept me stocked with towels and any thing the room needed. It was a great stay I can’t rave enough about this hotel and your amazing staff also their was another lady that worked when Larissa was not there and she was also amazing and very helpful. I can’t wait to come back next year.
- Maria (7/5): -
- carlos (10/5): Great spot! - Clean and good location to half moon bay. 2 blocks of walking, safe area. Food all around.
- callejas (3/5): - huele a aguas negras
- Jessica (10/5): Great place to stay for a few night and enjoy the West End area! - Central location to go to and from.
- jose (10/5): - Exelent service It was good
- Rene (6/5): - Fue una experiencia diferente. No me abaso tanto en el hotel me abaso en las playas. Pero ya no se ba apoder viajar a Roatán muchos me dijero cuando me yebaban en taxi que las playas tienen dueño. Osea todo esta privatizadas ya no hay para escojer de decir bamos a bañar ayi. La verdad es una lastima.
- Stephanie (6/5): - The property has all the basic needs, hot shower, comfy bed, spacious rooms. Hotel is in the 3rd floor of the turtle building so be prepared to climb sets of stairs. When we walked in the rooms smelled clean with a bleach smell. Eventually through our stay we did get really bad smells of sewage and old dirty pipes. We did let the staff know, they said they were being fixed. Other than that the place doesn’t offer any restaurant or food, but there is a small Asian restaurant in the first floor and a gas station right next door. It is conveniently located super close to the famous west end bars and restaurants. If you’re traveling on a low budget, this is the place for you.
- Rosemary (10/5): - Good affordable place
- Valiska (8/5): Very good -
- Carolina (10/5): - The staff was very friendly, the room was really nice, it was clean. The hotel is located on a main road so it was noisy
- mitchel (8/5): - Clean rooms, air conditioning, friendly staff, short walk to the beach and restaurants. Good price
- Carolina (6/5): - Not keep clean I expected better
- mitchel (8/5): - Simple clean rooms, good bed, mini fridge, and AC. Short walk to the beach and all the shops/restaurant. Good price.
Hotel is on the third floor and there is no elevator, not a problem for us but good for people to be aware of.
- Katraina (6/5): Pleasant - Location was nice. However, I was really surprised by the rate of the dry cleaning for my laundry it was really too much for a small amount of laundry. I loved the room but no elevator access was very inconvenient and there were too many steps to go up to the room; as all of the rooms were located on the 5th floor . But overall I enjoyed the stay.
- Jamie (6/5): - Cami was very responsive provided what ever we asked for. Keep in mind the gas station next door & its on the main road to West end. Its about a 8-10 minute walk to the West end.
Room was clean, ac worked good and hotel on third floor there is no elevator. So if you dont like stairs or can't carry your luggage its not for you. Overall was a good stay. The restaurant called The Shack across the street in the Aluminum Airstream as great hamburgers fish sandwich & onions rings!
- Danny (8/5): Overall a nice stay, especially for the price. - The staff was great. They helped out with any situation from getting you a cab to booking a ride to their other hotel on the beach. The noise from the road was very annoying.
- Dan (8/5): - Spaious room with excellent internet and decent TV service Great towels and good linen. Hot water was slow but plentiful. Fridge in room and microwave available in office. Close to gas staion which has a number of excellent eating choices. Chinese restauarant on ground floor. Seating area on the outside hallway was very pleasant. Only negative was the poor lighting of the hotel, both in hallway and in the room
- Diverdan28 (8/5): Great room just a few minutes from the beach - Overall, I was quite pleased with my 8-days stay at Los Corales. The room is big with a large storage unit to spread out your gear. It was equipped with a small refrigerator, super A/C, cable TV, excellent WiFi, hot water, and a sturdy double bed. Outside on the external hallway, there is a small table and chairs patio set, and 2 chairs for relaxing.
The cable service was quite extensive including a few English language channels. The quality of the signal was rarely good however. The Wifi was solid and I was able to do video calls via WhatsApp almost every day.
There is a microwave in the office which you can use whenever someone is present.
The shower unit was nicely sized and though the hot water was slow to arrive, it was ample when it got there. The bathroom also had two fluffy towels which seemed new. The bed was ok with a firm mattress though the quality of the linen was mediocre. The room was serviced, I think, only once during my stay but the office staff are there all day should you require anything urgently
I used the patio set for taking small meals and the large plastic chairs for reading. If you are on the south side, it does get very hot on a sunny day. There is lots of space to drag a chair into the room though. The A/C unit cools the room quickly.
Though located right on the main road, I was not overly disturbed by traffic noise.
The location is quite superb. It is only a 6-8 minute walk to the beach. Bring a flashlight though as the street are not well illuminated.
Next door is the Petrosun service station which has an excellent coffee bar, a pizza place, a sub sandwich shop, plus all the groceries and drinks you might require. There is a Chinese restaurant on the ground floor which does enormous meal servings.
My main issue was the poor lighting at night on the external hallway. This compounded by an absence of staff during the night, might put some travellers off.
I would definitely consider them for a return visit.
- Bowman (5/5): Passable -
- Bowman (1/5): Bad -
- Karina (1/5): Good location but very expensive for what is offering - Location The staff, the service, the cleaner, there is no breakfast, bad value for the price
- 378jiec (10/5): Nice stay - Totally positive experience. The mini split A/C is effcient and quite, and can sufficiently cool down the room. Easy walk to West End beach and restaurants. My kid forgot his airpods in the room after we checked out. We called the hotel and staff member who answer the call went to our room right away and found the airpods. Thank you!!
- Leonel (8/5): Very good - Location There was a small leakage in the bathroom sink, no biggie, said they’ll fix; either, still will stay again in this hotel
- Trucking (7/5): Good - It was affordable but it's is in the 3rd floor ,
ThevNegative is that they went to replaced the door lock without warn me I could lost something.
- Bowman (8/5): Very good -
- Raimondo (1/5): Horrible - The receptionists and cleaning lady I had my foot cut for the shower drain and The owner did not ever receive me
- Tracy (10/5): - I loved the area, it is very close to restaurants and bars and the beach.
- Stephen (7/5): Good - Close to west bay/west end. Has free parking. Good value. loads of dust from roadworks, which isn't their fault. No wifi for the duration, also maybe not their fault. Easy enough to pick up a SIM for a few dollars though at the gas station, which I did.
- jacobsC989NQ (10/5): Best value in West End - Great option for budget and best value travelers to the area. Very accessible to the main strip of West End by a 5 min roadside walk. AC units in room could turn the room into an icebox. Showers warm up to nice temps after a few minutes of running. Very clean stay. Friendly customer service. Convenience store just a 20 yard walk away. Highly recommend.
- Lee (7/5): Good -
- Ronald (10/5): - Always enjoy my stay.
- Paul (7/5): This is a good budget traveler place to stay away from the main West End crowds. - Clean room. Room cleaned every day. Free coffee every morning at 7:00 AM in the office reception with a real coffee cup. Internet was good. Bed was comfortable. Staff was pleasant.
This was good and not so good: The gas station next door to the property. Basic items like water and snacks could be purchased here.
Restaurant across the street called “The Shack”. Recommend the cheese burger.
Soap and shampoo provided.
Small dorm refrigerator worked well.
Air conditioning worked well.
Electricity never went out.
Towels changed out daily. Next to large gas station that generated a lot of noise.
Poor road conditions, and high amount of traffic produced an incredible amount of dust, and poor air quality.
Hotel is located up 4 flights of stairs.
Gift shop across the road would occasionally blast music directly towards the hotel.
My room had a methane/sewage smell. After covering the shower drain with a plastic bag with a weight on top, the smell was much less.
Could have used more hangers. My room had 3.
There was not a deadbolt lock on my door. The doorknob lock provided little security.
- Grisal (1/5): Bad -
- Wendy (10/5): - This hotel is in a great location only few steps from west end night life… was clean a stuff was super helpfull I would recommend and stay here again!!
- Chelsea (8/5): Good location since it’s walking distance to the beach. Good hotel for its price - Close to the beach
- Maya (2/5): - Not at all like the photos. This is a janky motel in an unsafe area. Motel is the top floor of an abandoned mall. The reception is on 3rd floor and there is no elevator for luggage. I waited 20 min before someone came to check me in (the receptionist was hiding in the attic). WiFi went out for 1 day. The surrounding buildings had roosters and rabbits on their tin roofs. 0/10 do not recommend!
- robertabianchi1969 (10/5): nice stay in west end - Brand new hotel on the second floor of an artistic building.
Close to the gas station with supermarket offering also cooked food (baleadas, pancakes, salads, etc). Short walking distance to west end Main Street and beach. Coffee offered at the reception. Taxi service on request. Free shuttle to their other property in West Bay (las Rocas hotel and dive centre).
The rooms was clean and well equipped. Extremely kind staff. If you go to roatan because you love the sea, I suggest a boat tour to the est end (ours started from oaks ridge). The public bus stops by the gas station.
- Hope (9/5): Superb - Everything it was good
- Helen (8/5): Very good -
- Verified traveler (10/5): Good place - Good place to stay. Has a gas station with food etc next to it. Good price for a 5-10 minute walk to west end and beach. Rooms are simple. A place to shower and sleep. The staff are very nice.
- Laura (6/5): Decent overall and good for the price - The location was a walkable distance to the nearest beach, although the roads aren’t very nice. It can be done safely. The air conditioning worked great and the staff was very friendly. The room was clean and we didn’t have any issue with lack of attention from the cleaning staff.
The shuttle was convenient to get to the big beach but we were happy at the nearby one most days. They have a water jug in the office and it was great being able to fill up a bottle occasionally. We bought a gallon jug to keep in the room additionally. I didn’t realize it was up three flights of stairs, which was difficult for me after a long day out.
More importantly there were bugs almost daily. We didn’t have issues with food, but we found ants carrying other larger dead bugs out to eat on at least three separate days. The door had huge gaps around it so that’s probably where they get in, but the staff kept the place clean as best they could.
I hesitate to link this other one to them because it’s outside of their control, but the neighbor has absolutely miserable dogs. She leaves them on the porch for hours on end and they bark excessively. I’m talking four dogs barking multiple times per minute each… until 1am one day, put out at 4am a different day, and for hours at a time most other nights. We had a lot of trouble sleeping because of it and even though it’s not the hotels fault, it’s something to keep in mind if you plan to book here.
- Gagnon (7/5): Good -
- Justin (8/5): - Power went out twice and they don’t have a back up generator. Power was restored in a decent amount of time but it was inconvenient.
- heidic159 (10/5): Amazing Vacation spot close to everything. - Hotel Los Corales was exactly the place we needed for our family. We reserved two side by side rooms and had plenty of room to spread out. It was simple and affordable and had everything we needed. The staff was so sweet and helped us plan all of our adventures, saving lots of dollars. We walked down to West End easily and could water taxi anywhere else we wanted. The bakery below smelled great and we bought bread from them that we ate for breakfast. The gas station and other restaurants around served for a few other meals. Our experience in Roatan was amazing and we can’t wait to go back!
- carlos (10/5): - El personal muy amable muy limpio y agradable
- robertofA5900LG (8/5): Perfect for business - Everything was clean, the location is perfect if you like to walk and know west end or west bay. The attention was pretty good too. The receptionist was so kind and helpful. You have so much places to go around the hotel.
- Said (9/5): Superb - Great choice. Not far from the beach (5-6min walk), convenient gas station in front, very very helpful personel!
Great! Had some issues with the air conditioning, bit the personal was very reactive
- Jaimie (10/5): amazing hotel and a great price! Close to town! Excellent Wi-Fi and staff! - Quick walk to town(my daily exercise)on nice path, only 5 min. Great price. Perfect for solo traveler’s, or those wanted to spend time, exploring the island and not wasting money on a hotel.
The staff was exceptional. They sent me up with an AWESOME excursion with Roger, and they were super friendly with anything I needed. Wi-fi worked great and nice to have a fridge in room. I utilized the shuttle service coming back from West Bay three times. A little better than the water taxi because sometimes they won’t take you if there’s not many people.
honestly, for the money, this hotel is hands-down, one of the best in town! Juice, bar, and coffee shop within a minute walk Nothing!! Everything was great!!
- Karrin (10/5): - Really clean place I love the customer service experience that I received
- Matthew (8/5): I would recommend this hotel to anyone who wants a clean comfortable room, at an excellent price - The location is excellent, It’s a 5 minute walk to the West End where all the dive shops restaurants and shopping is. The ladies at the checkin are wonderful. Very friendly and helpful. The room was very clean , had a mini fridge, the AC worked well. The bathroom was clean and everything worked and lots of hot water (it takes a minute but it is coming). And the bed was very comfortable Nothing
- Kelly (9/5): Superb - The location was great, a short walk to the beach. Front staff was amazingly friendly and helpful. Beds were comfortable and rooms were spacious and well kept.
- Sebastien (5/5): Passable - The hotel is nice 3rd floor, funky smell in the room, takes 5 to 10 minutes before you get hot water in the shower. Remote from west end, 5 to 10 mins walk.
- Amanda (7/5): Great price for a clean, comfortable room. Wish i had been on or closer to the beach. - The rooms were extremely clean, the bed very comfortable, and the rain showers were hot and perfect after a long beach day. Great wifi too. The staff weee highly accommodating and lovely to deal with. I was disappointed in the location. I had read on booking.com reviews it was a short 5 min walk to town up a small road. The reality is it’s on the main road going into town, next to a gas busy station. The walk takes about 7-10 minutes and the road was busier than i expected. (But walking is doable.)
- Einav (10/5): Exceptional - free shuttle, great staff
- O'connor (7/5): perfect - location and comfort
- Flores (8/5): Very good -
- Anonymous (8/5): Very good -
- Leonel (8/5): - I did not like about this hotel is that the rooms don't have Iron and the bathroom don't have hanger towels next to the shower.
- Robert (9/5): Superb -
- O'connor (7/5): cracked tile in one of rooms, gave us room 1/2 price. - clean, comfortable, great location. next to convent store and gas station.
- Wendy (9/5): Wonderful! - Tasha and Nash are amazing! I hope that you will appreciate those girls for how they take care of your establishment. They deserve a raise or bonus!! Nothing
- Anahi (10/5): Exceptional - The hotel and staff was so nice nothing, I loved everything
- Arzu (9/5): Superb -
- Clifford (10/5): - Very nice and clean hotel
- Rony (2/5): Nightmare - We did not stay in the hotel, when we arrived it was closed, no reception.
- Sebastien (6/5): - Reception and rooms are on the 3rd floor, no elevator.
- Elizabeth (10/5): Comfortable hotel - Great veranda to sit out on clean comfortable good pressure and hot water
Note hotel is on third floor and no one to help w bags
Also there was no airport transfer but thankfully same taxi that dropped us picked us up
- Lena (8/5): - Very friendly staff and a very clean hotel
- Tara (8/5): - The hotel was very affordable, clean and steps to West End. The complementary daily shuttle to West Bay was convenient and saving. The staff was very helpful and even remembered our names. The petrol next door provided affordable food/snack and a place to pickup a cab.
The hotel was noisy from traffic and roosters. It is also on the 3rd floor of a building without an elevator so carrying a large bag is difficult.
Overall, I recommend the hotel and would stay there again.
- Curiosity19082051339 (2/5): Receptionist ruined our trip after roatán - The receptionist told us we can order a PCR test straight to the hotel and receive the results after a few hours. Appearently it was not a PCR test even after we asked her if she is sure. We had to go to another place to get the right test but we received the results too late and had to delay our entire trip and flights because of her.
- Charles (10/5): - Clean rooms, across street from one of the island’s major convince stores with a coffee shop, restaurants, gym, laundry services etc…
- THOMAS (8/5): - Very nice people, clean and accomodating, very simple
- Verified traveler (8/5): - Very clean, nice staff.
Only downside is for those who might be really able to go up a few flight of stairs to get to the third floor where the hotel is located.
- Verified traveler (10/5): - very good
- Verified traveler (10/5): - Jjnbbbb
- Chels (10/5): - Everything was great except 3 flights of stairs, no elevator.
- stephen (10/5): Nice option in Roatan - Nice hotel a quick walk to the water. Hotel also provides a shuttle to west bay and also u can take a water taxi for $3 which is fun. Store next door and fruit stand scross the street.
- A.montiel (10/5): - The rooms were a great size for the price, the staff was overall amazing. The front desk lady Shetina went above and beyond for us, the daytime and nighttime security did also. Not one thing negative to say. Thank you guys for such a great stay.
- jessejames018 (10/5): Family Vacay - Family Vacation was perfect. Excellent location, has a gym, bakery and restaurant on the first floor. Walking distance to the restaurant and club strip. Great for family vacation. I could not be happier with the hotel.
- Verified traveler (10/5): Great hotel - A lovely hotel. We usually stay right next to beach and this hotel is a bit gurther away but great quality and service. Not noisy in spite of being close to road.
- Jr (10/5): - Everything was nice and clean
I will stay there next time
Photos