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The VS category is divided into two grades; VS1 denotes a higher clarity grade than VS2. Typically the inclusions in VS diamonds are invisible without magnification; however, infrequently some VS2 inclusions may still be visible. An example would be on a large emerald cut diamond which has a small inclusion under the corner of the table. [2]
“Most inclusions are microscopic, so a diamond with slight inclusions—VS1 or VS2—can still appear flawless to the naked eye,” says Landau. Carat “Carat refers to the diamond’s physical ...
OS/VS2 Release 1 is a replacement for MVT with virtual memory. There are many changes, but it retains the overall structure of MVT. In 1974 IBM released what it described as OS/VS2 Release 2 but which is a major rewrite that was upwards-compatible with the earlier OS/VS2 SVS.
In 1974 IBM announced release 2.0; that release and all subsequent releases became known as Multiple Virtual Storage . All releases of OS/VS2 were available to no charge because the software cost was bundled with the hardware cost. OS/VS2 Release 3.8 was the last free release of MVS. In the late seventies and early eighties IBM announced:
So OS/VS1 and SVS in principle had the same disadvantages as MFT and MVT, but the impacts are less severe because jobs and operators could request much larger partitions with a 2 KiB granularity (for OS/VS1) or regions with a 4 KiB granularity (for SVS), and the requests came out of a 16MiB address space even if physical storage was smaller.
OS/360, officially known as IBM System/360 Operating System, [1] [2] is a discontinued batch processing operating system developed by IBM for their then-new System/360 mainframe computer, announced in 1964; it was influenced by the earlier IBSYS/IBJOB and Input/Output Control System (IOCS) packages for the IBM 7090/7094 [citation needed] and even more so by the PR155 Operating System for the ...
Operating System/Virtual Storage 1, or OS/VS1, is a discontinued IBM mainframe computer operating system designed to be run on IBM System/370 hardware. It was the successor to the Multiprogramming with a Fixed number of Tasks (MFT) option of System/360 's operating system OS/360 .
Single Virtual Storage (SVS) [1] [2] refers to Release 1 of Operating System/Virtual Storage 2 (OS/VS2); it is the successor system to the MVT [note 1] option of Operating System/360. OS/VS2 (SVS) was a stopgap measure pending the availability of MVS , although IBM provided support and enhancements to SVS long after shipping MVS.