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A virtual tape library (VTL) is a data storage virtualization technology used typically for backup and recovery purposes. A VTL presents a storage component (usually hard disk storage) as tape libraries or tape drives for use with existing backup software.
A simple arithmetic calculator was first included with Windows 1.0. [6]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.
The Casio PB-1000 is a handheld computer released by Casio in 1987 (Released in Japan in 1986). It featured a touchscreen display which consisted of 16 keys built into the screen, arranged in fixed positions on a four by four matrix.
Overwriting a tape that was meant to be preserved was another potential mistake. [4] It was the tape librarian's responsibility to set up procedures for the handling of tapes to minimize the chances of errors taking place. [4] As one book of the era wrote, "keeping track of the whereabouts of the tapes is a formidable and responsible job." [1]
Channel Gateway (CGX) [5] is mainframe virtual tape controller software and hardware (together, an "MVT controller") that provides mainframe access to disk-based open systems storage by acting as tape control units and presenting the storage as "virtual" tape drives (emulating IBM 3490/3590) via FICON or ESCON channels. As tape controllers, CGX ...
The IBM Selective Sequence Electronic Calculator (SSEC) was an electromechanical computer built by IBM. Its design was started in late 1944 and it operated from January 1948 to August 1952. Its design was started in late 1944 and it operated from January 1948 to August 1952.
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