VMOS was originally named TSOS ( Time Sharing Operating System ), but was renamed to expand the system beyond the time-sharing market.

Looking back over the history of its development, BS2000 / OSD has its roots in the TSOS operating system ( TSOS: Time Sharing Operating System ) first developed by RCA for the / 46 model of the Spectra / 70 series, a computer family of the late 1960s related in its architecture to IBM ’ s / 360 series.

BS2000 V2. 0 – In June 1975, Siemens shipped the enhanced version of the TSOS operating system for the models of the Siemens 7. 700 mainframe series for the first time under the name BS2000.

RCA originally called this operating system Time Sharing Operating System ( TSOS ), running on RCA's Spectra 70 line of virtual memory systems and changed its name to VMOS before the Sperry acquisition of RCA CSD.

BS2000 V1. 0 – Porting of the TSOS operating system to models of the Siemens system 7. 700

The operating systems which ran on the 90 / 60 included RCA's TSOS operating system and Sperry's own VS / 9 operating system.

Right from the outset TSOS also allowed the data peripherals to be accessed only via record-or block-oriented file interfaces, thereby preventing the necessity to implement device dependencies in user programs.

But her prettiness was what he had noticed first, and all the other things had come afterward: cruelty, meanness, self-will.

There was an artificial lake just out of sight in the first stand of trees, fed by a half dozen springs that popped out of the ground above the hillside orchard.

The first part of the road was steep, but it leveled off after the second bend and curled gradually into the valley.

No one was behind it, but in the rear wall of the office I noticed, for the first time, a door which had been left partially open.

The herd was watered and then thrown onto a broad grass flat which was to be the first night's bedground.

Once again, Tom Horn was the first and most likely suspect, and he was brought in for questioning immediately.

For Matilda, it was the first she had known in many a night.

Even the knowledge that she was losing another boy, as a mother always does when a marriage is made, did not prevent her from having the first carefree, dreamless sleep that she had known since they dropped down the canyon and into Bear Valley, way, way back there when they were crossing those other mountains.

Stevens was grunting over the last empty pocket when Russ abruptly rose and lunged toward Carmer's hat, which had tumbled half-a-dozen feet away when he first fell.

The Indian's arm whipped sidewise -- there was a flash of amber and froth, the crash of the bottle shattering against the side of the first car.

It was her first smile.

At first, I thought he was out of his head, talking wildly like this.

Hell, I gave him the first decent job he ever had, six, seven -- how many years ago was it, Rob ''??

Miss Langford ( her first name was Evelyn ) was an attractive girl.

School began in August, the hottest part of the year, and for the first few days Miss Langford was very lenient with the children, letting them play a lot and the new ones sort of get acquainted with one another.

It was just as well that the ignorant Dandy enjoyed himself to the hilt that first evening, for the room was to become his prison cell.

`` Bastards '', he would say, `` all I did was put a beat to that Vivaldi stuff, and the first chair clobbered me ''!!

In 1961 the first important legislative victory of the Kennedy Administration came when the principle of national responsibility for local economic distress won out over a `` state's-responsibility '' proposal -- provision was made for payment for unemployment relief by nation-wide taxation rather than by a levy only on those states afflicted with manpower surplus.

The first systematic thinking about this Pandora's box within Pandora's boxes was done four years ago by Fred Ikle, a frail, meek-mannered Swiss-born sociologist.

The smell at first was more surprising than unpleasant.

His collaboration with Washington, begun when he was the general's aide during the Revolution, was resumed when he entered the first Cabinet as Secretary of the Treasury.

AIX was the first operating system to utilize journaling file systems, and IBM has continuously enhanced the software with features like processor, disk and network virtualization, dynamic hardware resource allocation ( including fractional processor units ), and reliability engineering ported from its mainframe designs.

AIX / 370 was IBM's third attempt to offer Unix-like functionality for their mainframe line, specifically the System / 370 ( the prior versions were a TSS / 370 based Unix system developed jointly with AT & T c. 1980, and VM / IX a VM / 370 based system developed jointly with Interactive Systems Corporation c. 1984 ).

AIX / ESA, while technically advanced, had little commercial success, partially because UNIX functionality was added as an option to the existing mainframe operating system, MVS, which became MVS / ESA OpenEdition in 1999.

And while it was one of the largest producers of mainframe computers in the world, Burroughs also produced related equipment as well, including typewriters and printers.

The System / 360 architecture was so popular that it dominated the mainframe computer market for decades and left a legacy that is still continued by similar modern computers like the IBM zSeries.

While the PDP-5 introduced a lower-cost line, 1963's PDP-6 was intended to take DEC into the mainframe market with a 36-bit machine.

The PDP-10 was as much a success as the PDP-6 was a failure ; during its lifetime about 700 mainframe PDP-10s were sold before production ended in 1984.

* The DOS / 360 initial / simple operating system for the IBM System / 360 family of mainframe computers ( it later became DOS / VSE, and was eventually just called VSE ).

The hierarchical structure was used in early mainframe DBMS.

EBCDIC () was devised in 1963 and 1964 by IBM and was announced with the release of the IBM System / 360 line of mainframe computers.

Don Daglow wrote an enhanced version of the program called Ecala on a PDP-10 mainframe computer at Pomona College in 1973 before writing what was possibly the second or third computer role-playing game, Dungeon ( 1975 ) ( The first was probably " dnd ", written on and for the PLATO system in 1974, and the second may have been Moria, written in 1975 ).

The facilities at the centre, initially labelled ESDAC ( European Space Data Acquisition Centre ), were essentially a large mainframe computer or computers, which was made available both to its in-house staff and to visiting scientists and fellows who wished to use them to analyse and study the recovered data.

During the 1960s and 1970s, the term mainframe computer was almost synonymous with IBM products due to their marketshare.

The 3270 series was designed to connect with mainframe computers, often at a remote location, using the technology then available in the early 1970s.

When one of these keys is pressed, it will cause its control unit, historically, an 3174 or IBM 3274 but later the mainframe integrated communications adapter, to generate an I / O interrupt and present a special code identifying which key was pressed.

It was a piece of hardware that plugged into a PC and connected to a coaxial cable towards the mainframe.

Kermit was developed at Columbia University in 1981 to allow students to transfer files between IBM or DEC DECSYSTEM-20 mainframe computers and removable media on microcomputers ( initially Intertec Superbrains running CP / M ).

It was ported to a wide variety of mainframe, minicomputer and microcomputer systems.

In 1978, around the same time Roy Trubshaw wrote MUD, Alan E. Klietz wrote a game called Milieu using Multi-Pascal on a CDC Cyber 6600 series mainframe which was operated by the Minnesota Educational Computing Consortium.

AberMUD was initially written in B for a Honeywell L66 mainframe under GCOS3 / TSS.

Multiple Virtual Storage, more commonly called MVS, was the most commonly used operating system on the System / 370 and System / 390 IBM mainframe computers.

It was developed by IBM, but is unrelated to IBM's other mainframe operating systems, e. g., VSE, VM.