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The TOPS-10 System was a computer operating system from Digital Equipment Corporation (DEC) for the PDP-10 released in 1964.

TOPS-10 had an interesting scheduler of having many run queues, unlike OpenVMS for example which has two run queues, and inserts processes into the queue depending on process priority. The TOPS-10 Operating System also included User file and Device independence. Code concepts developed for TOPS-10 ended up in RSX-11 that ultimately ended up in OpenVMS. These same operating system design ideas can probably be traced to current operating systems like Microsoft's Windows NT.

It featured one or two interesting Easter_egg_%28virtual%29 s. For example, the command

MAKE LOVE

gave the response

Not War?

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Topics: TOPS-10, TOPS 20, Topspinner, Topsfield Maine, Topsail Beach...

TOPS-20The TOPS-20 operating system by DEC the second proprietary OS for the PDP-10 preferred by most PDP-10 hackers over TOPS-10 (that is, by those who were not ITS or WAITS partisans). TOPS-20 began in 1969 as Bolt, Beranek and Newman's TENEX operating system,	TopspinnerIn cricket, a topspinner is a delivery where the ball comes out the top of the bowler's hand, causing it to spin in the direction of travel. The ball tends to dip in flight, but when the ball bounces, it bounces higher than normal and travels quicker than	Topsfield, MaineTopsfield is a town located in Washington County, Maine. As of the 2000 census, the town had a total population of 225. Geography According to the United States Census Bureau, the town has a total area of 142. 7 mi²) of it is land and 11. 4 mi²) of it is
Topsail Beach, North CarolinaTopsail Beach is a town located in Pender County, North Carolina. As of the 2000 census, the town had a total population of 471. Geography Topsail Beach is located at 34°22'13" North, 77°37'33" West (34. 370399, -77. According to the United States Census	Topsham, VermontTopsham is a town located in Orange County, Vermont. As of the 2000 census, the town had a total population of 1,142. It contains four villages: East Topsham, Topsham Four Corners, Waits River and West Topsham. Geography According to the United States Cen	Topsham (CDP), MaineTopsham is a census-designated place located in Sagadahoc County, Maine. As of the 2000 census, the CDP had a total population of 6,271. Geography According to the United States Census Bureau, the CDP has a total area of 29. 0 mi²) of it is land and 0.
Topsham (town), Maine	Topsfield (CDP), Massachusetts	Topsfield, Massachusetts
TOPS	Topsail	Topsy the Elephant
Topsoil	TOPS-10	Topsite

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