John Wulp
Latest News on John Wulp:
Tony Award-Winner John Wulp Passes Away at Age 90 (Nov 30, 2018)
Photo Coverage: Inside Opening Night of THE SAINTLINESS OF MARGERY KEMPE (Jul 13, 2018)
THE SAINTLINESS OF MARGERY KEMPE To Open Off Broadway This July (May 29, 2018)
Tony Award-Winner John Wulp Passes Away at Age 90 (Nov 30, 2018)
Photo Coverage: Inside Opening Night of THE SAINTLINESS OF MARGERY KEMPE (Jul 13, 2018)
THE SAINTLINESS OF MARGERY KEMPE To Open Off Broadway This July (May 29, 2018)
Photos
Productions
Writing
Author of Source Material
Awards and Nominations
winner
Drama Desk Awards - 1979 - Outstanding Set Design
John Wulp, The Crucifer of Blood
winner
Outer Critics Circle Awards - 1979 - Best Set Design
John Wulp, The Crucifer of Blood
Tony Awards - 1979 - Best Scenic Design
John Wulp , The Crucifer of Blood
winner
Tony Awards - 1978 - Most Innovative Production of a Revival
John Wulp, Dracula
Videos
News
Tony Award-Winner John Wulp Passes Away at Age 90
It has been reported American producer, scenic designer, director, artist, and playwright John Wulp passed away this week at age 90.
It has been reported American producer, scenic designer, director, artist, and playwright John Wulp passed away this week at age 90.
Photo Coverage: Inside Opening Night of THE SAINTLINESS OF MARGERY KEMPE
Perry Street Theatricals and Jonathan Demar in association with Frederick M. Zollo and Diane Procter present The Saintliness of Margery Kempe by John Wulp, which opened just last night at New York City's The Duke on 42nd Street (located on 229 West 42nd Street, between 7th and 8th Avenues).
Perry Street Theatricals and Jonathan Demar in association with Frederick M. Zollo and Diane Procter present The Saintliness of Margery Kempe by John Wulp, which opened just last night at New York City's The Duke on 42nd Street (located on 229 West 42nd Street, between 7th and 8th Avenues).
THE SAINTLINESS OF MARGERY KEMPE To Open Off Broadway This July
Perry Street Theatricals and Jonathan Demar in association with Frederick M. Zollo and Diane Procter are thrilled to announce that The Saintliness of Margery Kempe by John Wulp, will begin performances on Thursday, July 5, 2018 at New York City's The Duke on 42nd Street (located on 229 West 42nd Street, between 7th and 8th Avenues). The Saintliness of Margery Kempe will hold its opening night on Thursday, July 12.
Perry Street Theatricals and Jonathan Demar in association with Frederick M. Zollo and Diane Procter are thrilled to announce that The Saintliness of Margery Kempe by John Wulp, will begin performances on Thursday, July 5, 2018 at New York City's The Duke on 42nd Street (located on 229 West 42nd Street, between 7th and 8th Avenues). The Saintliness of Margery Kempe will hold its opening night on Thursday, July 12.
Tony Award Winner Cynthia Nixon to Lead Industry Reading of THE SAINTLINESS OF MARGERY KEMPE
John Wulp and Perry Street Theatricals will present an invite-only industry presentation of THE SAINTLINESS OF MARGERY KEMPE written by John Wulp, directed by Austin Pendleton on October 20th at 3 pm.
John Wulp and Perry Street Theatricals will present an invite-only industry presentation of THE SAINTLINESS OF MARGERY KEMPE written by John Wulp, directed by Austin Pendleton on October 20th at 3 pm.
NY Public Library's Lewis and Dorothy Cullman Curator Doug Reside on the Highlights of 2016
BroadwayWorld continues our exclusive content series, in collaboration with The New York Public Library for the Performing Arts, which delves into the library's unparalleled archives, and resources. Below, check out a piece by Doug Reside, Lewis and Dorothy Cullman Curator for the Billy Rose Theatre Division, The New York Public Library for the Performing Arts on: Political Satires in The New York Public Library for the Performing Arts' Theatre on highlights from 2016.
BroadwayWorld continues our exclusive content series, in collaboration with The New York Public Library for the Performing Arts, which delves into the library's unparalleled archives, and resources. Below, check out a piece by Doug Reside, Lewis and Dorothy Cullman Curator for the Billy Rose Theatre Division, The New York Public Library for the Performing Arts on: Political Satires in The New York Public Library for the Performing Arts' Theatre on highlights from 2016.
RED EYE OF LOVE Cast Album Featuring Kelli O'Hara, Brad Oscar & Josh Grisetti Out Today
Ghostlight Records releases the cast album of the new musical comedy RED EYE OF LOVE today, September 16, 2016.
Ghostlight Records releases the cast album of the new musical comedy RED EYE OF LOVE today, September 16, 2016.
Photo Coverage: Red Eye Of Love CD Release
Ghostlight Records yesterday released the cast album of the new musical comedy RED EYE OF LOVE. The studio cast recording of the show - which is based on an original play by Arnold Weinstein, with music bySam Davis and book and lyrics by Arnold Weinstein and John Wulp - features the Tony Award-winning Broadway star Kelli O'Hara (The King & I, South Pacific), Tony Award winner Brad Oscar (Something Rotten!, The Producers), and Josh Grisetti(Honeymoon in Vegas), in addition to a cast of Broadway favorites. The booklet includes studio photography, a synopsis and a special note from John Wulp. As of September 2, customers that pre-order the album on iTunes will receive an immediate download of the title track. To pre-order the physical album, please visit www.sh-k-boom.com/red-eye-of-love-studio-cast-recording.
Ghostlight Records yesterday released the cast album of the new musical comedy RED EYE OF LOVE. The studio cast recording of the show - which is based on an original play by Arnold Weinstein, with music bySam Davis and book and lyrics by Arnold Weinstein and John Wulp - features the Tony Award-winning Broadway star Kelli O'Hara (The King & I, South Pacific), Tony Award winner Brad Oscar (Something Rotten!, The Producers), and Josh Grisetti(Honeymoon in Vegas), in addition to a cast of Broadway favorites. The booklet includes studio photography, a synopsis and a special note from John Wulp. As of September 2, customers that pre-order the album on iTunes will receive an immediate download of the title track. To pre-order the physical album, please visit www.sh-k-boom.com/red-eye-of-love-studio-cast-recording.
RED EYE OF LOVE Cast Album Featuring Kelli O'Hara, Brad Oscar & Josh Grisetti Out Next Month
Ghostlight Records will release the cast album of the new musical comedy RED EYE OF LOVE on Friday, September 16, 2016.
Ghostlight Records will release the cast album of the new musical comedy RED EYE OF LOVE on Friday, September 16, 2016.
BWW Reviews: Absurdist Satire Meets Musical Comedy in RED EYE OF LOVE
Alli Mauzey and Josh Grisetti shine in a a daffy, enjoyable lark.
Alli Mauzey and Josh Grisetti shine in a a daffy, enjoyable lark.
Photo Flash: Off-Broadway's RED EYE OF LOVE Celebrates Opening Night
Amas Musical Theatre in association with North Haven Arts and Enrichment welcomes Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) to lead the cast of the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, opening night was last night, September 4. BroadwayWorld has photos from the opening festivities and curtain call below!
Amas Musical Theatre in association with North Haven Arts and Enrichment welcomes Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) to lead the cast of the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, opening night was last night, September 4. BroadwayWorld has photos from the opening festivities and curtain call below!
RED EYE OF LOVE, Starring Josh Grisetti, Alli Mauzey and Kevin Pariseau, Opens Off-Broadway Tonight
Amas Musical Theatre in association with North Haven Arts and Enrichment welcomes Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) to lead the cast of the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews began at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on August 27, 2014. Opening night is set for tonight, September 4 at 8pm. Performances will continue through September 28, 2014.
Amas Musical Theatre in association with North Haven Arts and Enrichment welcomes Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) to lead the cast of the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews began at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on August 27, 2014. Opening night is set for tonight, September 4 at 8pm. Performances will continue through September 28, 2014.
Photo Flash: First Look at Josh Grisetti, Alli Mauzey and More in RED EYE OF LOVE Off-Broadway
Amas Musical Theatre in association with North Haven Arts and Enrichment presents Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davis and scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews began at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on August 27, 2014. Opening night set for tomorrow, September 4 at 8pm. Performances will continue through September 28, 2014. BroadwayWorld has a first look at the cast in action below!
Amas Musical Theatre in association with North Haven Arts and Enrichment presents Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davis and scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews began at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on August 27, 2014. Opening night set for tomorrow, September 4 at 8pm. Performances will continue through September 28, 2014. BroadwayWorld has a first look at the cast in action below!
Amas Musical Theatre's Musical Love Triangle RED EYE OF LOVE Begins Previews Tonight
Amas Musical Theatre in association with North Haven Arts and Enrichment welcomes Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) to lead the cast of the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) tonight, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014.
Amas Musical Theatre in association with North Haven Arts and Enrichment welcomes Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) to lead the cast of the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) tonight, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014.
TV Exclusive: Josh Grisetti Previews RED EYE OF LOVE
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway'sJosh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau(Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music bySam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. BroadwayWorld is excited to bring you an exclusive preview from Josh Grisetti below!
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway'sJosh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau(Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music bySam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. BroadwayWorld is excited to bring you an exclusive preview from Josh Grisetti below!
TV Exclusive: Alli Mauzey Previews RED EYE OF LOVE!
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau(Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. BroadwayWorld is excite dto bring you an exclusive prview from Alli Mauzey below!
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau(Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. BroadwayWorld is excite dto bring you an exclusive prview from Alli Mauzey below!
THIS WEEK IN PICTURES: August 2-8
Whether you've been living under a rock for the past week or you're just in the mood for a recap, BroadwayWorld's 'this week in pictures' is here to satisfy your end-of-the-week fix! Take a look below to catch up on the latest happenings from the Great White Way to The West End (and everywhere in between) with coverage of press events, rehearsals, opening nights and more. Highlights this week include The Public Theatre's KING LEAR, Constantine Maroulis' return to ROCK OF AGES, the opening of the Off-Broadway production of PHOENIX, and more!
Whether you've been living under a rock for the past week or you're just in the mood for a recap, BroadwayWorld's 'this week in pictures' is here to satisfy your end-of-the-week fix! Take a look below to catch up on the latest happenings from the Great White Way to The West End (and everywhere in between) with coverage of press events, rehearsals, opening nights and more. Highlights this week include The Public Theatre's KING LEAR, Constantine Maroulis' return to ROCK OF AGES, the opening of the Off-Broadway production of PHOENIX, and more!
Photo Coverage: RED EYE OF LOVE Cast Meets the Press
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway'sJosh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau(Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winnerTed Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. The company just met the press and you can catch photos from inside the event below!
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway'sJosh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau(Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winnerTed Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. The company just met the press and you can catch photos from inside the event below!
Photo Coverage: In Rehearsal with the Cast of RED EYE OF LOVE
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway'sJosh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau(Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winnerTed Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. The company just met the press and you can catch photos from inside rehearsal below!
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway'sJosh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau(Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winnerTed Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. The company just met the press and you can catch photos from inside rehearsal below!
FREEZE FRAME: Meet The Company of RED EYE OF LOVE
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. The company met the press earlier today and you can catch a photo preview from the event below. Check back later for complete coverage!
Amas Musical Theatre in association with North Haven Arts and Enrichment will present Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) in the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014. The company met the press earlier today and you can catch a photo preview from the event below. Check back later for complete coverage!
Alli Mauzey, Josh Grisetti & Kevin Pariseau to Lead Amas Musical Theatre's RED EYE OF LOVE; Ted Sperling to Direct
Amas Musical Theatre in association with North Haven Arts and Enrichment has announced that Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) will head the cast of the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014.
Amas Musical Theatre in association with North Haven Arts and Enrichment has announced that Broadway's Josh Grisetti (Broadway Bound, Enter Laughing), Alli Mauzey (Wicked, Cry-Baby), and Kevin Pariseau (Legally Blonde) will head the cast of the New York Premiere of Red Eye of Love, a new musical (based on the 1961 play by Arnold Weinstein) with book and lyrics by Arnold Weinstein and John Wulp, music by Sam Davisand scenic design by renowned American artist Robert Indiana. Directed by Tony Award winner Ted Sperling, previews will begin at the Dicapo Opera Theatre (184 East 76th Street at Lexington Avenue) on Wednesday, August 27, 2014. Opening night set for Thursday, September 4 at 8pm. Performances will continue through September 28, 2014.
FREQUENTLY ASKED QUESTIONS
How many shows has John Wulp written?
John Wulp has written 1 shows including The Saintliness of Margery Kempe (Author of Source Material).
What awards has John Wulp been nominated for?
Outstanding Set Design (Drama Desk Awards) for The Crucifer of Blood, Best Set Design (Outer Critics Circle Awards) for The Crucifer of Blood, Best Scenic Design (Tony Awards) for The Crucifer of Blood and Most Innovative Production of a Revival (Tony Awards) for Dracula.
What awards has John Wulp won?
John Wulp has won the following awards: Outstanding Set Design from the Drama Desk Awards for The Crucifer of Blood, Best Set Design from the Outer Critics Circle Awards for The Crucifer of Blood, and Most Innovative Production of a Revival from the Tony Awards for Dracula.
Videos