Paraísos: julio 2019

miércoles, 31 de julio de 2019

lunes, 29 de julio de 2019

England - Unofficial National Anthem "Jerusalem"

Abide with Me - Organ,Soprano cornet and Flugelhorn

TE DEUM LAUDAMUS (Domingo Zipoli) ANTIQUE CORDOVA ENSAMBLE

Once Upon A Time In The West (Ennio Morricone) cover - By Harmony Highway

Andrea Bocelli, Katherine Jenkins - I Believe (Official Music Video)

Katherine Jenkins - Quello che faro (Everything I Do)

Julian Ovenden sings 'Younger than Springtime'

The lion sleeps tonight - George David Weiss

Beethoven's 9th - Ode To Joy | Dolby Headphone 3D sound from Imm...

No Llores Por Mi Argentina (Don't Cry for Me Argentina)

You're My Everything - Richard Clayderman

Theme from Sunflower (Henry Mancini)

Što to bješe ljubav - U sjećanje na Olivera Dragojevića

EKSEPTION - Another History - piano - Harry Völker

Rachmaninov Musical Moment No.4 in E minor - Anastasia Makhamendrikova #...

Maksim Mrvica - Croatian Rhapsody

Josef Suk A Summers Tale, Pohadka leta Op.29 JSkat.57

Ennio Morricone - Finding Each Other Again (Love Affair OST)

Rachmaninov - Rhapsody On A Theme Of Paganini - 18th Variation

Chopin Tristesse Etude No3, Op10 Lang Lang

Percy Faith - The song from Moulin Rouge

George Gershwin - Rhapsody in Blue

Carpenters - The End of the World

domingo, 28 de julio de 2019

Vangelis - El Greco - 1998 - Movement X (Epilogue)

Alan Hovhaness: Symphony No.19 'Vishnu' (1966)

Simon & Garfunkel - The Boxer (Audio)

Mattinata - The impossible Duet - Aida Garifullina & Mario Lanza

Ildebrando D'Arcangelo - La ci darem la mano - Salzburg 2014

Don Giovanni - La ci darem la mano - Hvorostovsky & Fleming

Le Nozze di Figaro ; "Non più andrai, farfallone amoroso"

Julia Lezhneva - Agitata da due venti (Griselda/Vivaldi)

Gloria - Tribute to Laura Branigan (1952-2004)

Lulu To Sir With Love 1967 Stereo

Let The River Run - Carly Simon

Arr. David Munrow : Dances from Thomas Morley's 'First Booke of Consort ...

Gheorghe Zamfir : Rhapsodie du printemps, Romanian Rhapsody for panpipes...

and the sun will shine lyrics.wmv

Alice Coltrane - Turiya And Ramakrishna

Alan Hovhaness - Symphony No. 66, Hymn to Glacier Peak, Op. 428 [Rockwel...

Julia Lezhneva HASSE SIROE "Di tuo amor mio cor è indegno"

Sibelius - Symphony No 2 in D major, Op 43 - Beecham

barry gibb ~ love is blind / demo# of a fantastic song

Barbra Streisand-Come Tomorrow

sábado, 27 de julio de 2019

Beethoven - Piano Concerto No 5 - Zimerman, Wiener Philharmoniker, Berns...

Krystian Zimerman plays Beethoven Sonata No. 8 in C minor, Op. 13 (Pathé...

Krystian Zimerman plays Beethoven Piano Sonata No 8 in C minor Op 13 1st...

Vivaldi- Bajazet RV 703: Barbaro traditor

Vivaldi - 'Anch'il mar par che sommerga' - Dilyara Idrisova

Julia Lezhneva - "Tu del Ciel ministro eletto"

Dilyara Idrisova - Zerflisse mein herze - Johannes Passion (excerpt)

Mikhail Antonenko: Beethoven Piano Concerto No 1, op.15 C-major. Allegro...

Julia Lezhneva: Rossini, "Tanti affetti in tal momento... Fra il padre"

Julia Lezhneva sings "Voi che sapete", Le Nozze di Figaro, Cherubino

Galuppi - Alla tromba della Fama

Baldassare Galuppi "Harpsichord Concerto in C minor"

Schubert - Serenade ; Violin - Isaac Stern

Itzhak Perlman plays Schubert's serenade accompanied by Rohan de Silva o...

Paul Mauriat Hungarian Dance nº 5

" The Way We Were " - Romance Violin Vol. 1

LVHF 2018: H. P. Johnsen -Koncert F Dur pro 2 fagoty- 2.věta Largo e sta...

Patricia Janečková - Ombra Mai Fu - Postorna - 2017

ENNIO MORRICONE & Susanna Rigacci in evening clothes (HD REMIX) 'Ecstas...

The Good, The Bad and The Ugly-Ennio Morricone Live@Palais Omnisports (P...

Brenda Lee - The end of the world(1963)

Vincent (Starry Starry Night) Don McLean

barry gibb ~ not in love at all / hawks soundtrack 1988

Haydn : Concerto in E-flat major for trumpet and orch. Hob VIIe/1 (1796)...

Gheorghe Zamfir : Concerto No. 1 in G major for panpipes and orchestra (...

J.S. Bach: The Violin Concertos

viernes, 26 de julio de 2019

A summer place - theme and song

Noches en los jardines de España (Nights in the Gardens of Spain) by Man...

Part 1: Alicia de Larrocha, Nights in the Gardens of Spain -RIP (Descans...

Manuel de Falla "El sombrero de tres picos"

Wolfgang Amadeus Mozart "Sinfonía nº 40 en Sol menor, K. 550"

Wolfgang Amadeus Mozart "Divertimento n° 11 en Re mayor, k 251"

ELVIS PRESLEY - ALWAYS ON MY MIND

Michael Buble & Barbra Streisand "It Had To Be You"

Moon River (instrumental) - Henry Mancini

Moon River: London FILMHarmonic Orchestra Featuring Noa Bodner on Harmonica

Moon River (Original Main Title) - Henry Mancini

'Un Homme et une Femme' by Francis Lai performed by Robert Gomez

Arthur Honegger Pacific 231 Mouvement Symphonique No 1

Orlando di Lasso - "Ola! O che bon eccho!"

Cavatina → soundtrack from the film "The deer hunter" (John Williams) ��

"Marche de Sacco et Vanzetti" Georges Moustaki en live à la Philharmo...

Ennio Morricone - Here's to you - Arènes de Nîmes 2015

Ennio Morricone - Here's to You (In Concerto - Venezia 10.11.07)

bee gees -- God's good grace / outtake 1971

Praetorius - Danses de Terpsichore

Balakirev - Valses-Caprice no. 1 and 2

Giuseppe Albanese plays Debussy - Ballade

Carl Nielsen: Symphony No.5, Op. 50 - Leonard Bernstein

Krystian Zimerman - Chopin: Ballade No.4 in F minor Op.52

Hovhaness 1970 SY22 'City of Light'

Hovhaness 1955 SY02 Mysterious Mountain

Krystian Zimerman: Chopin's Scherzo No. 2, Op. 31 Live, 1979 Video [Rema...

Krystian Zimerman - Chopin: Ballade No.3 in A-flat Major Op.47

Andy gibbs - our love (don't throw it all away)

Alan Hovhaness * Sinfonia n. 6 op. 173 "Celestial gate"

Julia Fischer live with Sibelius Violin concerto

Hilary Hahn playing Sibelius with the Vienna Philharmonic Orchestra live...

Hilary Hahn - Rautavaara Violin Concerto (1976-1977) - 1st Movement

Alan Hovhaness " The Spirit of the Trees"

Recorrido Completo por Larcomar en Lima Perú.

Bee Gees-High Civilization-True Confessions(HD)

Tomaso Albinoni - Adagio in G Minor

J. S. Bach – Cantatas BWV 120, 11, 9, 112 – T. Koopman (Vol. 20 CD3)

Zimerman - Beethoven, Piano Concerto No. 5 - II Adagio

Shostakovich - Piano Concerto No. 2: II. Andante

jueves, 25 de julio de 2019

The Orchestra of Russian Folk instrument "Balalaika" - plays Russian fol...

Jaromír Weinberger (1896-1967) : Schwanda the Bagpiper, Polka and Fugue ...

Can't help falling in love - Elvis Presley. Traducida al español

Two Guitars Russian Gypsy Music

AUTUMN LEAVES - RICHARD GALLIANO TANGARIA QUARTET

Love Story, Where Do I Begin (Andy Williams) by Jon England

MICHEL LEGRAND - I WILL WAIT FOR YOU - LES PARAPLUIES DE CHERBOURG

Plante Plays:Chopin-Schumann-12 sides-78's-1928-laneaudioresearch 2017

I Could Not Love You More by Bee Gees

I don't know why bother with myself- The Bee Gees

Mendelssohn Violin Concerto OP 64 & Bach Sonata Violin No.2 (Full Perfor...

Dvořák: 9. Sinfonie (»Aus der Neuen Welt«) ∙ hr-Sinfonieorchester ∙ Andr...

J. S. Bach – Cantatas BWV 120ª, 156, 1127 – T. Koopman (Vol. 20 CD1)

miércoles, 24 de julio de 2019

Lo Mejor de Ennio Morricone - Las Mejores Bandas Sonoras de Películas - ...

Bee Gees - Stayin' alive [unreleased instrumental edit]

Melody(1971) - Teach Your Children

Johann Nepomuk Hummel "Concierto para piano, violín y orquesta en Sol ma...

Alexander Glazunov - Poème Lyrique Op. 12 (1884/87) (Svetlanov)

Karelian Legend op. 99 by Alexander Glazunov

martes, 23 de julio de 2019

Alicia de Larrocha plays De Falla Three Dances from El Sombrero de Tres ...

Paul Lincke (1866-1946) : Hochzeitsreigen, Walzer (1905)

19th Century Norwegian Orchestral Miniatures, conducted by Bjarte Engeset

Ennio Morricone : The Lady Caliph

For A Few Dollars More - The Danish National Symphony Orchestra (Live)

Rautavaara: Symphony No. 7, "Angel of Light" - 3. Come un sogno

Peter Gunn Theme by Henry Mancini

Taneyev - Overture on a Russian Theme (1882)

Fragil perfume de las Rosas, Richard Clayderman.

Richard Clayderman - Paseo por los Bosques

Josef Suk, Pohádka, Op 16, A Fairy Tale

Sibelius Symphony No. 2 - Barbirolli

Einojuhani Rautavaara: Concerto for Birds and Orchestra “Cantus Arcticus...

The London Symphony Orchestra - The Final Countdown

Godfather with Gimnazija Kranj Symphony Orchestra

THE GODFATHER - Nino Rota - Orkester Mandolina Ljubljana - Maestro Andre...

Kitaro - The Light Of The Spirit (live in Zacatecas, Mexico - April 7, 2...

St Petersburg Chamber Choir - Chorale

Sacred Treasures III: Choral Masterworks from Russia and Beyond

BEETHOVEN Concerto for Violin and Orchestra - Hilary Hahn, violin

OSBu Va, Pensiero - Nabucco (Giuseppe Verdi) subtítulos en español

Wilhelm Berger - Piano Quintet in F minor, Op. 95

Praetorius: Es Ist Ein Ros Entsprungen (Monteverdi Choir)

lunes, 22 de julio de 2019

J. S. Bach: Jesu, nun sei gepreiset (BWV 41)

Here Comes The Sun - The Beatles Tribute

Simon & Garfunkel - The Sounds of Silence (Audio)

J. S. Bach - Cantatas BWV 41, BWV 7, BWV 139 – T. Koopman (Vol.11 CD2)

The Elegance of Pachelbel – Serenade

Dances with Wolves-Músic-John Barry(performed by Andre Rieu)HD.

André Rieu - Conquest of Paradise (Live at the Amsterdam Arena)

vangelis - chariots of fire from mythodea HQ

Vangelis - Conquest of Paradise (Legendado)

1492. CONQUISTA DEL PARAISO. Vangelis. Director: Miguel Roa

Yesterday - Orquestra Ouro Preto

Can't Help Falling In Love Elvis Presley - Lyrics

Eric Clapton - Tears In Heaven (lyrics)

Elvis- Always on My Mind [With Lyircs]

American Light Orchestral Classics, from the Reader's Digest archives

Reinhold Gliere: Festive Overture, op. 72 (1937)

Jean Sibelius - Snôfrid, Op. 29 - Paavo Jârvi

Words-Jesse Kinch(Bee Gees Cover)

bee gees --- give a hand take a hand / unreleased song from ' mr. natu...

Karl Michael Ziehrer (1843-1922) : Faschingskinder, Walzer Op. 382 (1886)

Oskar Nedbal (1874-1930) : Two Operetta Overtures (1911/1916)

Georges Enescu : Romanian Rhapsody No. 1 in A major for orchestra Op. 11...

The Bee Gees - Chocolate Symphony

domingo, 21 de julio de 2019

With All Nations (International Anthem)

Cistercian chant - Odoriferum Lilium

Henry V: Non Nobis and Te Deum

Henry V -- St. Crispin's Day Speech Music

"Alleluia, Behold the Bridegroom" - St. Petersburg Chamber Choir from Sa...

Bee Gees Wine And Women Lyrics Video [HQ]

The Bee Gees - Wine & Women (1965)

Julius Fučík (1872-1916) : Three Waltzes (1894-1909), conducted by Václa...

Charles Gounod - La valse de l'opéra 'Faust' / Waltz

Iosif Ivanovici (1845-1902) : Donauwellen, Walzer (1880)

Franz von Suppé : Isabella, Overture to the operetta (1869)

Aram Khachaturian : Masquerade, Suite from the incidental music (1941 r...

Aram Khachaturian : Gayne, Suite No.3 from the original version of the b...

Aram Khachaturian : Gayne, Suite No.2 from the original version of the b...

Aram Khachaturian : Gayne, Suite No.1 from the original version of the b...

Hugo Alfvén : The Prodigal Son, Suite from the ballet R.214 (1957)

Jennifer Rush - The Power Of Love (Official Video) (VOD)

My Heart Will Go On (Love Theme from "Titanic")

Céline Dion - Immortality (Official Video) ft. Bee Gees

Barbra Streisand - Woman in love (with lyrics)

sábado, 20 de julio de 2019

Celine Dion & Barbra Streisand - Tell Him with lyrics

Barbra Streisand & Barry Gibb - What Kind Of Fool (1980)

BARBRA STREISAND - PROMISES [1981] LEGENDADO

DIANA ROSS & BEE GEES - EXPERIENCE - Tradução 2016 HD

Theme From Mahogany (Do You Know Where You're Going To)

DIANA ROSS (i love) being in love with you

Kiri te Kanawa. Laudate Dominum. W. A. Mozart.

viernes, 19 de julio de 2019

Cecilia Bartoli, Mozart, "Laudate dominum"

Flower duet - Anna Netrebko & Elina Garanca (Lakmé de Delibes)

H. Grimaud 2/3 Rachmaninov piano concerto No.2 in C minor, op.18 [Adagio...

H. Grimaud 1/3 Rachmaninov piano concerto No.2 in C minor, op.18 [Moderato]

J. S. Bach – Cantatas BWV 127, BWV 5, BWV 94 – T. Koopman (Vol.11 CD1)

J. S. Bach - The Complete Liturgical Year in 64 Cantatas - S. Kuijken (C...

Karel Komzák II (1850-1905) : Bad'ner Mad'ln, Walzer Op. 257 (1898)

Rodrigo Martinez - La Folia (La Capella de Ministrers)

Ashkenazy, Chopin Nocturne No.8 in D flat major, Op.27-2

Chopin - Nocturne Op. 27 No. 2 (Rubinstein)

Chopin - Nocturne for piano and violin

Chopin - Spring Waltz 432hertz

Frederic Chopin - Mysterious Forest

Krystian Zimerman - Chopin: Ballade No.2 in F-Major Op.38

Krystian Zimerman - Chopin: Ballade No. 1 in G Minor, Op. 23

jueves, 18 de julio de 2019

JUIIA LEZHNEVA-A. Vivaldi Ippolita's aria "Zeffiretti,che sussurrate"fro...

Julia Lezhneva: "Sombre forêt", Rossini

"The Orthodox Singers" Male Choir - Do not cast me off in the time of ...

G.Briccialdi. Fantasy on themes from the opera "La Traviata" by Verdi.

Philippe Jaroussky. "Ombra mai fu" ( Serse ) by G.- F. Händel.

Placido Domingo sings Panis angelicus and Ave Maria

I Dreamed A Dream - Hayley Westenra - BBC Proms in the Park Belfast 2012

Charlotte Church - Panis Angelicus (Live From Brixton Academy)

Dame Joan Sutherland and Luciano Pavarotti - 'Parigi, o cara' Verdi's La...

Luciano Pavarotti Recital - Nessun Dorma | Metropolitan Opera/New York ᴴᴰ

P. A. Genin - Fantaisie sur La Traviata

Jeremiah Clarke - Trumpet Voluntary

George Frideric Handel - The Arrival of the Queen of Sheba

Luigi Boccherini: Minuetto (classical)

Valaam Monastery Choir- Trisagion

Valaam Brotherhood Choir - A Mercy of Peace

Novospassky Monastery Choir - A Mercy of Peace

Enya - Astra Et Luna - (Legendado)

Enya - Flora's Secret [720p HD] [LYRICS]

Enya - Hope Has a Place (To all the people who have ever loved... and lost)

Enya - I Could Never Say Goodbye

If i could be where you are - Enya Lyrics

EVERYBODY HURT-R.E.M (subtitulos en español).

Sting - Fields of Gold (subtitulos español)

Loreena McKennitt - Beneath a Phrygian Sky

Loreena McKennitt Never-ending Road

Loreena McKennitt - Two Trees (Lyrics on Screen)

Loreena McKennitt - The Mummers' Dance (HQ)

loreena mckennitt - mummers dance

Loreena McKennitt - The Mystic's Dream

miércoles, 17 de julio de 2019

Loreena McKennitt " Tango to Evora "

The Lady of Shalott by Loreena McKennitt with Lyrics

Elgar Serenade for Strings in E minor, Op 20 I, II Mov. Berliner Mendel...

2014 Honors Orchestra - "Finale - Serenade No., 9 - Posthorn"

Mozart : Serenade No. 9 in D major for orchestra 'Posthorn' K. 320 (1779)

Serenade No.9: Posthorn (SC All-State Orchestra)

Mozart : Serenade No. 7 in D major for orchestra 'Haffner' K. 250 (1776)

Scandinavian music for string orchestra, conducted by Richard Studt

Domenico Zipoli (1688-1726): Misa a San Ignacio - Credo

Land of hope and glory Last Night of the BBC Proms 2012

martes, 16 de julio de 2019

Joseph Haydn - Deutschland Uber Alles

Last Night Proms 2011 - Jerusalem, God Save The Queen & Auld Lang Syne

Kovcheg Male Voice Ensemble - We Praise Thee (Rachmaninov) - Audio Only

"Jerusalem" performed by the Cadet Glee Club of West Point

Mily Balakirev - Valse mélancholique

Ensemble Aria - Our Father (oktavist Pavel Myakotin)

Bless The Lord, O My Soul (S. Rachmaninoff "All-Night Vigil" / Vespers, ...

Royal Choral Society: 'Hallelujah Chorus' from Handel's Messiah

J. S. Bach Cantatas: BWV 60,78,151 - Leusink

J. S. Bach - Cantata BWV 78 Jesu, der du meine Seele - II. Duet

J.S. Bach - Cantata BWV 78 Jesu, der du meine Seele | 1 Chorus (J. S. Ba...

Johann Sebastian Bach. Jesu, der du meine Seele , BWV 78.

J. S. Bach: Jesu, der du meine Seele, BWV78 - BKCW

Mozart : Divertimento No. 7 in D major for two horns, bassoon and string...

Antonín Dvořák : Slavonic Dances for orchestra, selections from Op. 46 a...

Mozart : Divertimento No. 2 in D major for four horns, winds and strings...

lunes, 15 de julio de 2019

RUSSIAN ORTHODOX CHURCH MUSIC "Hallelujah" - WATCH LINK INFO

Russian Orthodox Chant "Let my prayer arise."

Clyde Davids - This Rock is Jesus

Once I read - soprano, choir & orchestra - Otis F Presbey, John Rodriguez

Softly and tenderly Jesus is calling

Guide me, O thou great Redeemer

Kiri Te Kanawa-Chi il bel sogno di Doretta

Kiri Te Kanawa O Mio Bambino Caro

Kiri Te Kanawa - O Mio Babbino Caro

Kiri Te Kanawa - 'World In Union' Music Video

Bussi: La Tribuna (suite sinfónica) - Josep Pons - Sinfónica de Galicia

Requiem MOZART - 1 Hour of Lacrimosa - Mozart - Lacrimosa (1 HOUR)

Nikolayeva Ich ruf zu Dir ,Herr BWV 639

J.S. Bach: Cantata "Ich ruf zu dir, Herr Jesu Christ" BWV 177 [Il Gardel...

J.S.Bach: Ein ungefärbt Gemüte, BWV24 - BKCW

J.S. Bach - Cantata BWV 24 "Ein ungefärbt Gemüte" (J.S. Bach Foundation)

Vaughan Williams : Fantasia for piano and orchestra (1896)

Vaughan-Williams: Orchestral suites (collection)

J. S. Bach - Sonatas & Partitas for solo violin (BWV 1001-1006) – S. Ku...

Richard Strauss : Also sprach Zarathustra, tone poem (1896)

W. A. Mozart: Concerto No.26 in D Major K.537 - Oxana Shevchenko

Richard Strauss : Le bourgeois gentilhomme, Suite from the incidental mu...

Misa de la Coronación Kv317, W. A. Mozart

domingo, 14 de julio de 2019

Leygraf plays Mozart Fantasy d-minor

Emil Gilels - Mozart - Fantasia No 3 in D minor, K 397

Wolfgang Amadeus Mozart "Misa en Do mayor KV 317_Misa de la Coronación"

You'll Never See My Face Again

Don't Wanna Live Inside Myself

Beethoven : Twelve Contretänze for orchestra WoO 14 (ca. 1791-1801)

sábado, 13 de julio de 2019

Wagner: El ocaso de los dioses - Götterdämmerung - (selección) - Josep P...

CASABLANCA - As time goes by - Die Wacht am Rheim - La Marsellesa

Blaz Arnic - Symphony #5 'Partikularna' Op.22 (1941)

Taneyev (Taneev) Piano Concerto in E flat major - Mikhail Voskresensky p...

Sergei Taneyev(1856-1915):Symphony Nº4 in C minor,Op.12(1901)

Bee Gees - The Only Love (Lyrics)

Dinu Lipatti Chopin Concerto #1 1st mvt. - Better sound!

Weber orch. Hector Berlioz : Aufforderung zum Tanz Op. 65 (1819 orch. 1841)

Mozart : Divertimento No. 11 in D major for two horns, oboe and strings ...

Bee Gees - Grease (with lyrics)

Dinu Lipatti plays Chopin Sonata No. 3 in B Minor Op. 58

ROBIN GIBB - All That I Cherish オール・ザット・アイ・チェリッシュ

Zygmunt Noskowski - Goral Fantasy

Noskowski - Piano Quartet Op.8 (II-III)

Hidden treasures ~ Zygmunt Noskowski ~ Variations in E minor for Orchest...

Giuseppe Verdi, Và pensiero (Nabucco)

"O Sole Mio" Pavarotti, Carreras, Domingo - Rome 1990 - DVD quality

ANDREA BOCELLI LIVE IN TUSCANI

Odessa (City On The Black Sea) The Bee Gees 1969

Bee Gees - To Much Heaven (Demasiado Cielo - Letra y Traducción)

Brahms : Hungarian Dances WoO.1 (1858-68/1879), selections arranged for ...

Balakirev - Symphony No. 1 In C Major

Solid - Robin Gibb (50 St. Catherine's Drive)

viernes, 12 de julio de 2019

Venetian Music of the Early Baroque

Dances and Music from the Italian Renaissance (com

1ra. Etapa : Fundación hasta 1810 Estilo Colonial

La casa colonial

Laciudad consistía en una monótona sucesión de patios, huecos y plazas entre paredes de barro y adobe.

La casa colonial se hallaba organizada alrededor de patios. Al primero se accedía a través de un zaguán, con una puerta importane de gran altura. e

En torno a este se abrían las habitaciones principales. La sala ocupaba un lugar privilegiado. Estos interires eran sencillos, con revoque de barro y bosta y, a veces un simple encalado. Los pisos, de tierra regada y apisonada o de ladrillos planos y los cielorrasos esaban construidos con vigas y ladrillos de techos. Sólo en algunos casos, las paredesse empapelaban; los cielorrasos se cubrían con una tela tensada y los pisos con mantas del interior o alfombras europeas. Luego se encontraban las áreas de servicio, con la cocina y las habitaciones de los sirvientes.

A fines del Siglo XVIII se utilizaron los aljibes con una gran cisterna que almacenaba el agua de lluvia recogida de los techos.