DOS is a family of disk operating systems primarily consisting of MS-DOS and a rebranded version under the name IBM PC DOS which were introduced in 1981, as well as some later compatible systems from other manufacturers: DR-DOS (1988), ROM-DOS (1989), PTS-DOS (1993), and FreeDOS (1998). MS-DOS dominated the x86-based IBM PC compatible market between 1981 and 1995.

Dozens of other operating systems also use the acronym "DOS", including the mainframe DOS/360 from 1966. Others are Apple DOS, Apple ProDOS, Atari DOS, Commodore DOS, TRSDOS, and AmigaDOS.

IBM PC DOS (and the separately sold MS-DOS) and its predecessor, 86-DOS, resembled Digital Research's CP/Mthe dominant disk operating system for 8-bit Intel 8080 and Zilog Z80 based microcomputers. DOS instead ran on Intel 8086 16-bit processors. Starting with MS-DOS 1.28 and PC DOS 2.0 the operating system incorporated various features inspired by Xenix, Microsoft's variant of Unix.

When IBM introduced the IBM PC, built with the Intel 8088 microprocessor, they needed an operating system. Seeking an 8088-compatible build of CP/M, IBM initially approached Microsoft CEO Bill Gates (possibly believing that Microsoft owned CP/M due to the Microsoft Z-80 SoftCard, which allowed CP/M to run on an Apple II). IBM was sent to Digital Research, and a meeting was set up. However, the initial negotiations for the use of CP/M broke down; Digital Research wished to sell CP/M on a royalty basis, while IBM sought a single license, and to change the name to "PC DOS". Digital Research founder Gary Kildall refused, and IBM withdrew. What are the answers to this following set of questions: 1. what oprocessor did IBM use int heir PC?
2. who did IBM initially approach?
3. why did they talkk to him?
4. what card might have given that impression?
5. what did that do?
6. what does DOS stand for?
7. name 2 main versions?
8. when were they introduced?
9. which market did MD-DOS dominate?
10. what years?
11. what year was FreeDOS launched?
12. what launched in 1988
13. which mainframe OS uses the acronym?
14. how many Apple versions were there?
15. name one
Answer: 1. 16-bit
2. Bill Gates
3. possibly believing that Microsoft owned CP/M
4. the Microsoft Z-80 SoftCard
5. allowed CP/M to run on an Apple II
6. disk operating systems
7. MS-DOS and IBM PC DOS
8. in 1981
9. the x86-based IBM PC compatible market
10. 1981 and 1995
11. 1998
12. DR-DOS
13. DOS/360
14. Two
15. Apple ProDOS

NEW YORK (CNN) -- An oil painting was returned Tuesday to the estate of a Jewish art dealer who was forced to consign the painting and other artwork under Nazi Germany before fleeing the country.

"Portrait of a Musician Playing a Bagpipe" was done in 1632 by an unknown artist.

The painting, "Portrait of a Musician Playing a Bagpipe," was done in 1632 by an unknown painter from the Northern Netherlandish school, according to a statement from the U.S. attorney's office in southern New York.

It was owned by Max Stern, an art dealer who had a gallery in Dusseldorf, Germany, until 1937, when the Nazis' Reich Chamber for Fine Arts ordered him to liquidate the gallery and its inventory, the statement said.

Stern, who died in 1987, left no heirs. He and his wife had founded the Max Stern Art Restitution Project, which directly benefits Concordia University and McGill University in Montreal, Canada, and Hebrew University in Jerusalem, according to a statement from U.S Immigration and Customs Enforcement.

The painting was returned Tuesday -- Holocaust Remembrance Day -- to Clarence Epstein of Concordia University on behalf of the executors of the estate, said Lou Martinez of the immigration agency.

It was returned in a ceremony at the Museum of Jewish Heritage in New York, he said.

The painting had been owned by Philip Mould Ltd., a London, England, gallery, when Lawrence Steigrad, a New York art dealer, bought it in 2008, the New York attorney's office said.

Neither had any idea of the painting's past. Philip Mould Ltd. had purchased the painting the year before from Lempertz Auction House. The same auction house sold the painting in 1937 after Stern was forced to liquidate, without receiving any proceeds from the sale, the New York attorney's office said. What are the answers to this following set of questions: 1. What type of painting was returned to the art dealer?
2. What was his religious affliction?
3. What did he have to do before leaving the country?
4. Who painted the artwork?
5. Who owned the painting?
6. When did he have to sell his inventory?
7. Why did he have to do this?
8. Where was his art gallery?
9. When was the painting returned?
10. What day of the week did that fall on?
11. Was the returning of the painting made official?
12. How so?
13. In what state did this take place?
14. Who purchased the painting in 2008?
15. Who was he?
16. Who owned it before that?
17. Where did this company do business?
Answer:
1. An oil painting
2. Jewish
3. he was forced to consign the painting
4. an unknown artist
5. Max Stern
6. in 1937
7. Nazis' Reich Chamber for Fine Arts ordered him to liquidate the gallery and its inventory
8. Dusseldorf, Germany,
9. on Holocaust Remembrance Day
10. Tuesday
11. yes
12. through a ceremony
13. New York
14. Lawrence Steigrad
15. a New York art dealer
16. Philip Mould Ltd
17. London, England