Margen Apartments - Tirana City Center

Location: Rruga Reshit Petrela; Kompleksi Usluga., Tirana, al

Star Rating: 9.5 Stars

Property Type: Apartments

About this Property

Important Information

Policies

Check-in: 03:00 PM - 12:00 AM

Check-out: 11:00 AM

Amenities & Facilities

• Non-smoking rooms
• Air conditioning
• Family rooms
• Lift / Elevator
• Express check-in/check-out
• Non-smoking throughout
• Private check-in/check-out
• Shuttle service (additional charge)
• Public transport tickets
• Outdoor furniture
• Staff adhere to local safety protocols
• Guest rooms disinfected between stays
• Cleaning standards that are effective against Coronavirus
• Physical distancing rules followed
• Hand sanitizer in guest room and key areas
• First aid kit available
• Sanitized tableware & silverware
• Invoice provided
• Guests can opt-out any cleaning services during stay
• Smoke alarms
• Shared stationery like menus, pens are removed
• Property cleaned by professional cleaning companies
• Physical distancing in dining areas
• Key access
• Food delivered to guest room
• Access to health care professionals
• Delivered food - securely covered
• Thermometers for guests provided by property
• ATM/banking
• Shopping on site
• Express check-in
• Free wired internet
• Airport transportation - pickup (surcharge)
• Airport transportation - drop-off (surcharge)
• Internet access
• Housekeeping on request
• Covered parking
• Secured parking
• Garage
• Accessible shuttle
• No accessible shuttle
• Accessible train station shuttle
• No accessible train station shuttle

Rooms Available

• One-Bedroom Family Apartment

  This apartment's special feature is the hot tub. Featuring a private entrance, this air-conditioned apartment consists of 1 living room, 1 separate bedroom and 1 bathroom with a shower and a bidet. Meals can be prepared in the well-fitted kitchen, which comes with a stovetop, a refrigerator and an oven. The spacious apartment provides a flat-screen TV, a washing machine, a tea and coffee maker, a seating area as well as mountain views. The unit offers 3 beds.

  Max Occupancy: 5 (5 Adults)

  • Coffee/tea maker
  • Shower
  • TV
  • Air conditioning
  • Hair dryer
  • Kitchenette
  • Refrigerator
  • Desk
  • Seating Area
  • Toilet
  • Washing machine
  • Private bathroom
  • Heating
  • Slippers
  • Kitchen
  • Private entrance
  • Sofa
  • Hardwood or parquet floors
  • Dining area
  • Electric kettle
  • Wardrobe or closet
  • Oven
  • Stovetop
  • Bidet
  • Cleaning products
  • Linen
  • Dining table
  • Outdoor furniture
  • Outdoor dining area
  • Upper floors accessible by elevator
  • Private apartment in building
  • Clothes rack
  • Drying rack for clothing
  • Toilet paper
  • Sofa bed
  • Bottle of water
  • Chocolate or cookies
  • Trash cans
  • Wine glasses
  • Cots
  • Shampoo
  • Body soap
  • Socket near the bed
  • Feather pillow
  • Accessible by lift
  • Lockers
  • Smoke alarm
  • Fire extinguisher
  • Key access
  • Hand sanitiser
  • Hearing accessible

• Large Double Room

  This double room features a hot tub. The spacious double room features air conditioning, a private entrance, a balcony with mountain views as well as a private bathroom boasting a shower. The unit has 1 bed.

  Max Occupancy: 2 (2 Adults)

  • Coffee/tea maker
  • Shower
  • TV
  • Air conditioning
  • Hair dryer
  • Refrigerator
  • Desk
  • Toilet
  • Private bathroom
  • Heating
  • Slippers
  • Private entrance
  • Hardwood or parquet floors
  • Dining area
  • Electric kettle
  • Wardrobe or closet
  • Bidet
  • Cleaning products
  • Linen
  • Dining table
  • Outdoor furniture
  • Outdoor dining area
  • Upper floors accessible by elevator
  • Private apartment in building
  • Clothes rack
  • Drying rack for clothing
  • Toilet paper
  • Bottle of water
  • Chocolate or cookies
  • Trash cans
  • Wine glasses
  • Shampoo
  • Body soap
  • Socket near the bed
  • Feather pillow
  • Accessible by lift
  • Lockers
  • Smoke alarm
  • Fire extinguisher
  • Key access
  • Hand sanitiser
  • Hearing accessible

• Family Two-Bedroom Apartment with View

  Guests will have a special experience as the apartment features a hot tub. Boasting a private entrance, this air-conditioned apartment includes 1 living room, 2 separate bedrooms and 1 bathroom with a shower and a bidet. Guests can make meals in the kitchen that has a stovetop, a refrigerator and an oven. The spacious apartment offers a flat-screen TV, a washing machine, a tea and coffee maker, a seating area as well as mountain views. The unit has 4 beds.

  Max Occupancy: 5 (5 Adults)

  • Coffee/tea maker
  • Shower
  • TV
  • Air conditioning
  • Hair dryer
  • Kitchenette
  • Refrigerator
  • Desk
  • Seating Area
  • Toilet
  • Washing machine
  • Private bathroom
  • Heating
  • Slippers
  • Kitchen
  • Private entrance
  • Sofa
  • Hardwood or parquet floors
  • Dining area
  • Electric kettle
  • Wardrobe or closet
  • Oven
  • Stovetop
  • Bidet
  • Cleaning products
  • Linen
  • Dining table
  • Outdoor furniture
  • Outdoor dining area
  • Upper floors accessible by elevator
  • Private apartment in building
  • Clothes rack
  • Drying rack for clothing
  • Toilet paper
  • Sofa bed
  • Bottle of water
  • Chocolate or cookies
  • Trash cans
  • Wine glasses
  • Cots
  • Shampoo
  • Body soap
  • Socket near the bed
  • Feather pillow
  • Accessible by lift
  • Lockers
  • Smoke alarm
  • Fire extinguisher
  • Key access
  • Hand sanitiser
  • Hearing accessible

• One-Bedroom Apartment

  This apartment's special feature is the hot tub. Featuring a private entrance, this air-conditioned apartment consists of 1 living room, 1 separate bedroom and 1 bathroom with a shower and a bidet. In the well-equipped kitchen, guests will find a stovetop, a refrigerator, an oven and a tea and coffee maker. This apartment features a washing machine, flat-screen TV, mountain views, as well as chocolate for guests. The unit offers 2 beds.

  Max Occupancy: 3 (3 Adults)

  • Coffee/tea maker
  • Shower
  • TV
  • Air conditioning
  • Hair dryer
  • Kitchenette
  • Refrigerator
  • Desk
  • Seating Area
  • Toilet
  • Dishwasher
  • Washing machine
  • Private bathroom
  • Heating
  • Slippers
  • Kitchen
  • Private entrance
  • Sofa
  • Hardwood or parquet floors
  • Dining area
  • Electric kettle
  • Wardrobe or closet
  • Oven
  • Stovetop
  • Bidet
  • Cleaning products
  • Linen
  • Dining table
  • Outdoor furniture
  • Outdoor dining area
  • Upper floors accessible by elevator
  • Private apartment in building
  • Clothes rack
  • Drying rack for clothing
  • Toilet paper
  • Sofa bed
  • Bottle of water
  • Chocolate or cookies
  • Trash cans
  • Wine glasses
  • Cots
  • Shampoo
  • Body soap
  • Socket near the bed
  • Feather pillow
  • Accessible by lift
  • Lockers
  • Smoke alarm
  • Fire extinguisher
  • Key access
  • Hand sanitiser
  • Hearing accessible

• Two-Bedroom Apartment

  The hot tub is a top feature of this apartment. Boasting a private entrance, this air-conditioned apartment comes with 1 living room, 2 separate bedrooms and 1 bathroom with a shower and a bidet. The well-fitted kitchen has a stovetop, a refrigerator and an oven. The spacious apartment features a washing machine, a tea and coffee maker, a seating area, a flat-screen TV, as well as mountain views. The unit has 4 beds.

  Max Occupancy: 5 (5 Adults)

  • Coffee/tea maker
  • Shower
  • TV
  • Air conditioning
  • Hair dryer
  • Kitchenette
  • Refrigerator
  • Desk
  • Seating Area
  • Toilet
  • Dishwasher
  • Washing machine
  • Private bathroom
  • Heating
  • Slippers
  • Kitchen
  • Private entrance
  • Sofa
  • Hardwood or parquet floors
  • Dining area
  • Electric kettle
  • Wardrobe or closet
  • Oven
  • Stovetop
  • Bidet
  • Cleaning products
  • Linen
  • Dining table
  • Outdoor furniture
  • Outdoor dining area
  • Upper floors accessible by elevator
  • Private apartment in building
  • Clothes rack
  • Drying rack for clothing
  • Toilet paper
  • Sofa bed
  • Bottle of water
  • Chocolate or cookies
  • Trash cans
  • Wine glasses
  • Cots
  • Shampoo
  • Body soap
  • Socket near the bed
  • Feather pillow
  • Accessible by lift
  • Lockers
  • Smoke alarm
  • Fire extinguisher
  • Key access
  • Hand sanitiser
  • Hearing accessible

• One-Bedroom Apartment

  This apartment's special feature is the hot tub. Featuring a private entrance, this air-conditioned apartment consists of 1 living room, 1 separate bedroom and 1 bathroom with a shower and a bidet. The well-fitted kitchen has a stovetop, a refrigerator, an oven and a tea and coffee maker. This apartment features a washing machine, flat-screen TV, mountain views, as well as chocolate for guests. The unit offers 2 beds.

  Max Occupancy: 3 (3 Adults)

  • Coffee/tea maker
  • Shower
  • TV
  • Air conditioning
  • Hair dryer
  • Kitchenette
  • Refrigerator
  • Desk
  • Seating Area
  • Toilet
  • Dishwasher
  • Washing machine
  • Private bathroom
  • Heating
  • Slippers
  • Kitchen
  • Private entrance
  • Sofa
  • Hardwood or parquet floors
  • Dining area
  • Electric kettle
  • Wardrobe or closet
  • Oven
  • Stovetop
  • Bidet
  • Cleaning products
  • Linen
  • Dining table
  • Outdoor furniture
  • Outdoor dining area
  • Upper floors accessible by elevator
  • Private apartment in building
  • Clothes rack
  • Drying rack for clothing
  • Toilet paper
  • Sofa bed
  • Bottle of water
  • Chocolate or cookies
  • Trash cans
  • Wine glasses
  • Cots
  • Shampoo
  • Body soap
  • Socket near the bed
  • Feather pillow
  • Accessible by lift
  • Lockers
  • Smoke alarm
  • Fire extinguisher
  • Key access
  • Hand sanitiser
  • Hearing accessible

Guest Reviews

• sergio (9/5): -
• Katarzyna (10/5): -
• Gentileschi (10/5): -
• Elbasan (5/5): -
• Eri (10/5): -
• Dominika (10/5): Szép, tiszta szállás, nagyon jó elhelyezkedéssel, közel a belvároshoz. A szállásadó nagyon kedves és segítőkész volt. - Szép, tiszta szállás, nagyon jó elhelyezkedéssel, közel a belvároshoz. A szállásadó nagyon kedves és segítőkész volt.
• Francesco (10/5): - Ottima posizione, proprietario sempre disponibile, appartamento pulito.
• Abdullah (9/5): -
• Semih (7/5): - Çalışan kimseyi görmedik normal airbnb evi tarzı apartman pis asansör pis ev genel olarak iyiydi karşıda otopark var 24 saate yakın kaldı araba 7.5 euro
• Mozher (10/5): It’s been nice and comfortable - Clean Clean spacious
• Jan (9/5): -
• Durmuş Ali (8/5): - Konumu çok iyi otopark dairenin altında aynı şekilde market ve cafeler de bulunmaktadır Tesis de dışarıdan gelen sesler çok net içeride duyulmaktadır ve rahatsız edici seviyede işletmecinin buna önlem alması gerekmektedir.
• Mariam (9/5): Aangenaam - Appartement was heel schoon! Perfecte locatie! Kon gebruik maken van de wachine iedere dag! We hebben een heel aangename verblijf gehad Dagelijks of om de 2 dagen bijvoorbeeld komen poetsen. Ik ging zelf doen iedere dag
• Kübra (10/5): Çok memnun kaldım , tekrar kalmak isteyeceğim bir yer. - Konum, temizlik, iletişim , klima çok iyiydi
• Ares (9/5): -
• Eri (10/5): -
• RICCIOTTI (7/5): - Posizione ottimale. Stanze abbastanza pulite, unica pecca in camera da letto luce non funzionante e porta sul balcone scorrevole che non si chiudeva. Il proprietario gentilissimo e disponibile. Tutto sommato è stato positivo
• bledar (10/5): - very nice !
• salvatore (8/5): Ottima esperienza ma migliorabile. - Ottimo appartamento in posizione comoda e tranquilla per girare la città. Abbiamo prenotato per 2 adulti e 3 bambi e l'appartamento offre ampi spazi ben organizzati, è presente anche una lavatrice e uno stendino, unica nota secondo me andrebbe migliorato l'angolo cucina con microonde e macchinetta da caffè.
• Mügeeee (9/5): -
• George (10/5): Wasn’t planning on staying here but it was SO good. The beds were so comfy the shower was lovely the tv was good everyth - Everything! Nothing!
• Sabrina (8/5): - Buon alloggio per un periodo breve. Buona posizione. Buon rapporto qualità prezzo. TV non collegata ad internet. Mancanza di kit bagno (sapone, shampoo) sostituiti con flaconi che non sono igienici.
• Orjana (10/5): -
• Pellumb Vela (8/5): -
• Kristi (10/5): - Very nice i sugest this appartment . Host was a great sir .
• Désiré (8/5): -
• Grejsi (9/5): -
• erkan (10/5): -
• Silvia (9/5): - El dto era pequeño pero muy bien decorado. Muy
• Mateo (10/5): -
• Emanuele (8/5): Ad ogni modo soggiorno tranquillo - Struttura nuova con la presenza di tutti i comfort essenziali Buona posizione soprattutto vicina a supermercati e bar A mio avviso potrebbe essere utile inserire anche la possibilità di effettuare una pulizia su richiesta. O comunque sarebbe necessario avere qualche cambio asciugamano
• Viktoria (10/5): - Bylo to opravdu čisté a celkově to vypadalo jako na fotkách a moc doporučuji! I komunikace s pánem byla naprosto v pořádku 😇
• Subaşı (10/5): - Herşeyi ile çok güzel. Konumu harika. Canınız ne isterse hemen çevresinde bulabilirsiniz. Çok rahat geldik.Blendi çok ilgili bir insan. Gönül rahatlığı ile kalabilirsiniz.
• Gjoka (10/5): -
• Hana001 (10/5): -
• Jonela (9/5): -
• Joana (10/5): Great but a bit too noisy outside. - The host was very nice! The apartment was clean and comfortable. The window isolation was not very good, we couldn’t sleep at night due to car noises outside.
• Diego (10/5): - The balcony was perfecttt!
• Lamallari (8/5): -
• Orsa (10/5): Consigliatissimo e host super disponibile - Casa pulitissima, posizione ottima per muoversi a piedi a pochi minuti dal centro. Sotto l’appartamento si trova anche un supermercato con ogni genere di necessità. Consigliatissimo.
• Sara (9/5): -
• Georgij (10/5): perfect - everything
• Artan (8/5): -
• Taulant (10/5): Geweldig - Dichtbij alles Niks
• Isabel (10/5): -
• Michael (10/5): -
• Sucke (10/5): - Very friendly host The apartment was clean and is located in a central position in Tirana.
• Matus (9/5): -
• Alrrr (5/5): -
• Omer (10/5): - Easy self check-in, apartment is just like in the photos. The host is very kind and helpful. Kitchen is well equipped. Beds are very comfortable.
• Şenol (10/5): -
• Henri (6/5): - Noisy location
• Lysa (10/5): - Facilité de communication avec le propriétaire, emplacement pratique pas très loin du centre de Tirana. Le logement était conforme aux photos et répond entièrement aux attentes! Il y a un parking privé en face du logement (400L pour 24h).
• Hawa (10/5): Top et très bon rapport qualité prix - Tout était parfait. Le gérant m’a envoyé une vidéo explicative qui m’a permis de trouver rapidement l’appartement la boîte à clef. Proche du centre de Tirana. L’appartement est tellement propre. Nous avons apprécié la climatisation dans la chambre et le salon. Difficulté de stationnement
• Begüm (7/5): -
• Arndt (10/5): Ein Super-Host mit tollem Angebot - Wir haben den Urlaub sehr genossen. Das Apartment hat alle Erwartungen erfüllt. Alles sehr modern und komfortabel. Wichtig: die Klimatisierung lässt sich im Schlafzimmer und Wohnraum individuell regeln. Bei Temperaturen von 35 Grad lebenswichtig. Das Bad ist toll. Gute Dusche, Waschmaschine - alles, was man braucht. Die Schlafcouch ist bequem und bietet einem Erwachsenen bis zu 1,95 m Größe einen vollständigen Schlafplatz. Besser geht es nicht. Besonders hervorzuheben ist der Vermieter Blendi. In jeder Situation sofort erreichbar, extrem hilfsbereit, steht mit Rat und Tat zur Seite und hilft auch bei der praktischen Daueranmietung eines TG-Platzes. (4 Euro am Tag) Er ist ein Super-Host. Selbst den Transfer zum Flughafen hat er zuverlässig organisiert. Kurzum für 3 Personen die ideale Unterkunft. Schlafzimmer sowie Wohn- Essraum mit Küche und Badezimmer sind sehr geräumig. Apartmentreinigung und Bettwäsche- / Handtuchtausch alle 4 Tage inklusive. Damit haben wir nicht gerechnet. Klasse. Gemütliche 10 Minuten zu Fuß bis in die Stadtmitte, Supermärkte und Restaurants direkt in der Nachbarschaft und ein belebtes Viertel, in dem sich Frauen auch alleine wohlfühlen. Sehr liebenswerte Menschen in der Nachbarschaft. Wir haben uns in Albanien verliebt und viele Ausflüge mit dem Mietwagen gemacht. Tirana dankt es mit 1000 Eindrücken. In Albanien selbst prallen Wandel und Tradition noch heftig aufeinander. Geben Sie dem Land Zeit, seien Sie nachsichtig und offen. Es lohnt sich. Wer sich mit Mietwagen ins Getümmel stürzt, sei gewarnt. Der Verkehr ist chaotisch und Regeln sind nur ein Anhalt. Gut versichern und mutig mittreiben lassen. Das hilft. Wir hatten zwei Wochen lang viel Glück. Die Stadt selbst ist mit Bussen gut zu erkunden. 40 Cent pro Fahrt sind alternativlos. In der Nähe des Apartments fahren alle relevanten Linien ab. Zentral ist genau das, was man hier erwarten darf. Ein Urlaub mit außergewöhnlichem Preis-Leistungsverhältnis. Nach Hause zu fliegen war schwer. Zu schön war die Zeit.
• Jean Pierre (10/5): Appartement très bien situé et propre . - Appartement très propre et très bien situé. Proche de tous les commerces, des arrêts de bus,et en bonus un parking 24/24 juste derrière le bâtiment qui coûte seulement 400 Lek pour 24 heures (4 euros). Le propriétaire est super sympa et dialogue a toute a heure pour répondre à nos questions.Je le remercie pour ce agréable séjour de 10 nuits passées dans son appartement. Rien , tout est ok!!
• Emanuele (9/5): Bello, pulito e moderno - Bello, pulito e tutto nuovo! Manca il parcheggio è in centro città è un CAOS parcheggiare.!
• Willeke (8/5): - De ruime accommodatie en de netheid Alles was prima in orde.
• şifa ayalılar ayken (10/5): -
• Van Merkestijn (9/5): Leuk plekje voor bezoek aan Tirana - Prima kamer, netjes en lekker bed. Redelijk nieuw appartement, tenminste van binnen. Gebouw is wel al ouder. Er werkte maar 1 lift en daar moest je soms lang op wachten. Meestal liepen wij daarom naar beneden.
• Stefanie (9/5): - Convenient location, 15min on foot to the city centre. Modern, clean, spacious. Big bathroom, comfortable beds, equipped kitchen. We had very bad luck and the electricity in the whole building was out from 3 to 9 pm, leaving us stranded without running water, AC or fridge. We had experienced shorter blackouts before, but never more than 15min, so this felt extreme and the problem was confined to the building only, not the area.
• Khalid (10/5): - L'appartamento è molto accogliente e pulito .
• Yassir (9/5): اذا كتب الله لنا العودة الي تيرانا ساختار الإقامة في عذه الشقة - الشقة نظيفة وبها مطبق وحمام وغسالة ولاحظت ان المضيف اهتم كثيرا بالتفاصيل مثل الإضاءة الحالمة والارضيات الرائعة وكذلك المكان قريب من قلب المدينة مع نوفر كامل الخدمات وقد ذهبنا مشيا الي ياخة اسكندر بيك الطريقة التي استلمت بها المفتاح اقرب للأفلام البوليسية
• MaraM (9/5): - Amazing, very spacious and comfortable apartment, situated in a clean and safe area
• Azza (10/5): -
• Hueiyen (10/5): 地點很讚，整潔的住宿。 - 住宿地點很好，離主要景點不遠。樓下也有超市，很方便。 離近大馬路，晚上到12點都還會有一些談話聲與車聲。若需要早點休息的人，可能會有影響。
• Tatiana (9/5): Skøn lejlighed med god beliggenhed. - Lejligheden er rummelig. pæn og meget ren med alt hvad man behøver til sit ophold. Dejlige spisesteder og lille supermarked i samme bygning. Man bor i fin gåafstand til centrum af byen og der er i området også en række små butikker, restauranter osv. samt en hæveautomat tæt på. Madrasserne er de bedste vi nogensinde har sovet på, så det var en ekstra bonus. Vi er vant til trafikstøj om natten, så det var ikke et problem for os. Vinduerne er dog meget tynde og der er en del støj fra gaden, så hvis man er sensitiv over for støj, når man skal sove, så skal man ikke vælge dette sted.
• Dilcan (10/5): -
• الشمراني (10/5): انصح بالسكن فيها بشدة - أعجبني❤️ اولاً تعامل صاحب الشقة ممتاز ثانيا الشقة نظيفة متوفر فيها كل شيء. ثالثا الموقع وقربها من السنتر ويوجد ماركت للتسوق. كله تمام
• Paşalıoğlu (9/5): -
• Rokiah (10/5): - Schoon, groot en dichtbij de stad. Eigenaar erg aardig en heeft duidelijk informatie gegeven voor dat we gingen inchecken. Geen
• Salman Zahid (10/5): - The apartment was very clean and well equiped
• Bledar (8/5): - Ήταν όλα πολύ καθαρά
• Jona (10/5): -
• Nuria (9/5): - Todo muy nuevo, muy amplio, limpio, bien ubicado. Aire acondicionado en cada habitación. Todo genial
• Alina (10/5): - Geräumiges, sauberes Zimmer. Bequeme Betten, geräumiges Bad. -
• Gabriel Gjoka (10/5): -
• Emilija (10/5): -
• Betim (10/5): -
• Imran (9/5): -
• Imran (8/5): -
• Veronika (10/5): Great apartment!!! - Really great apartment! Clean, spacious and good location! -
• Daniel (8/5): -
• CLAUDIA (10/5): Excelente!! - La ubicación, la limpieza , ropa blanca todo excelente
• Laila (10/5): - Appartement très spacieux, propre et idéalement situé. Parking payant à proximité.
• Nada (10/5): Good location, clean, confortable, well equiped - Clean, confortable, well equiped
• Giuseppe (7/5): - No colazione TV senza nessun canale. Tenda non ben scura alla finestra (alle 5.30 del mattino entra tanta luce) . Nessun lume sui comodini. Tutti dettagli cui si può porre rimedio con poco. Proprietario gentile e abbastanza disponibile
• Gjoka (10/5): -
• Nina (10/5): - The apartment was spacious, clean, and very comfortable. It's located close to the city center, which made it easy to explore everything on foot. There's a paid parking garage right next to the apartment, which was very convenient. The host was kind and welcoming, and he gave clear and detailed instructions on how to get to the apartment.
• Maria (10/5): -
• Luca (10/5): - Blendi is a very good host
• Xheladini (10/5): -
• Naresh (8/5): - Very central, and easy to get to. Host was very nice and gave detailed info on how to reach the property. There was no soap or shower gel so we had to buy this ourselves.
• Antonio (8/5): 2 giugno. - Posizione ottima Box doccia
• Gjoka (10/5): -
• IRINA (10/5): One of the best airbnb property I’ve used - Nice apartment, extremely clean, all the basic necessities provided including a bottle of water and nice welcome flowers on the table, nice clean bedsheets, extra blanket, duvet Cannot honestly think of anything
• Christian (9/5): Bello - Pulizia e posizione Tutto ok
• Aziz (9/5): -
• Albi (10/5): -

Photos