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System request, the Glossary

System Request (SysRq or Sys Req) is a key on personal computer keyboards that has no standard use.^[1]

43 relations: Alt key, Application software, BIOS, Break key, CodeView, Computer keyboard, Computer multitasking, Context switch, Control-Alt-Delete, CP/M-86, Debugger, Debugging, English language, IBM, IBM 3270, IBM PC DOS, IBM PC–compatible, IBM Personal Computer AT, IBM System/370, Intel 80286, Kernel (operating system), Keyboard buffer, Keyboard layout, Keyboard shortcut, Library (computing), Linux, Magic SysRq key, Mainframe computer, Microsoft, MS-DOS, MVS, Operating system, Print Screen, Scroll Lock, SK Hynix, Software, System console, Terminate-and-stay-resident program, UCSD Pascal, United States, VM (operating system), Windows NT, Xenix.
Computer keys
IBM personal computers
Out-of-band management

Alt key

The Alt key (pronounced or) on a computer keyboard is used to change (alternate) the function of other pressed keys. System request and Alt key are computer keys.

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An application program (software application, or application, or app for short) is a computer program designed to carry out a specific task other than one relating to the operation of the computer itself, typically to be used by end-users.

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BIOS

In computing, BIOS (Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the booting process (power-on startup).

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Break key

The Break key (or the symbol ⎉) of a computer keyboard refers to breaking a telegraph circuit and originated with 19th century practice. System request and break key are computer keys and out-of-band management.

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CodeView

CodeView is a standalone debugger created by David Norris at Microsoft in 1985 as part of its development toolset.

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Computer keyboard

A computer keyboard is a peripheral input device modeled after the typewriter keyboard which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches.

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Computer multitasking

In computing, multitasking is the concurrent execution of multiple tasks (also known as processes) over a certain period of time.

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Context switch

In computing, a context switch is the process of storing the state of a process or thread, so that it can be restored and resume execution at a later point, and then restoring a different, previously saved, state.

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Control-Alt-Delete

Control-Alt-Delete (often abbreviated to Ctrl+Alt+Del and sometimes called the "three-finger salute" or "Security Keys") is a computer keyboard command on IBM PC compatible computers, invoked by pressing the Delete key while holding the Control and Alt keys:. System request and Control-Alt-Delete are computer keys.

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CP/M-86

CP/M-86 is a discontinued version of the CP/M operating system that Digital Research (DR) made for the Intel 8086 and Intel 8088.

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Debugger

A debugger or debugging tool is a computer program used to test and debug other programs (the "target" program).

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Debugging

In engineering, debugging is the process of finding the root cause of and workarounds and possible fixes for bugs.

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English language

English is a West Germanic language in the Indo-European language family, whose speakers, called Anglophones, originated in early medieval England on the island of Great Britain.

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IBM

International Business Machines Corporation (using the trademark IBM), nicknamed Big Blue, is an American multinational technology company headquartered in Armonk, New York and present in over 175 countries.

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IBM 3270

The IBM 3270 is a family of block oriented display and printer computer terminals introduced by IBM in 1971 and normally used to communicate with IBM mainframes.

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IBM PC DOS

IBM PC DOS (an acronym for IBM Personal Computer Disk Operating System),Formally known as "The IBM Personal Computer DOS" from versions 1.0 through 3.30, as reported in those versions' respective COMMAND.COM outputs also known as PC DOS or IBM DOS, is a discontinued disk operating system for the IBM Personal Computer, its successors, and IBM PC compatibles.

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IBM PC–compatible

IBM PC–compatible computers are technically similar to the original IBM PC, XT, and AT, all from computer giant IBM, that are able to use the same software and expansion cards.

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IBM Personal Computer AT

The IBM Personal Computer AT (model 5170, abbreviated as IBM AT or PC/AT) was released in 1984 as the fourth model in the IBM Personal Computer line, following the IBM PC/XT and its IBM Portable PC variant.

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IBM System/370

The IBM System/370 (S/370) is a range of IBM mainframe computers announced as the successors to the System/360 family on June 30, 1970.

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Intel 80286

The Intel 80286 (also marketed as the iAPX 286 and often called Intel 286) is a 16-bit microprocessor that was introduced on February 1, 1982.

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Kernel (operating system)

The kernel is a computer program at the core of a computer's operating system and generally has complete control over everything in the system.

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Keyboard buffer

A keyboard buffer is a section of computer memory used to hold keystrokes before they are processed.

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Keyboard layout

A keyboard layout is any specific physical, visual, or functional arrangement of the keys, legends, or key-meaning associations (respectively) of a computer keyboard, mobile phone, or other computer-controlled typographic keyboard.

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Keyboard shortcut

In computing, a keyboard shortcut also known as hotkey is a series of one or several keys to quickly invoke a software program or perform a preprogrammed action.

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Library (computing)

In computer science, a library is a collection of read-only resources that is leveraged during software development to implement a computer program.

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Linux

Linux is both an open-source Unix-like kernel and a generic name for a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds.

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Magic SysRq key

The magic SysRq key is a key combination understood by the Linux kernel, which allows the user to perform various low-level commands regardless of the system's state. System request and magic SysRq key are out-of-band management and system administration.

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Mainframe computer

A mainframe computer, informally called a mainframe or big iron, is a computer used primarily by large organizations for critical applications like bulk data processing for tasks such as censuses, industry and consumer statistics, enterprise resource planning, and large-scale transaction processing.

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Microsoft

Microsoft Corporation is an American multinational corporation and technology company headquartered in Redmond, Washington.

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MS-DOS

MS-DOS (acronym for Microsoft Disk Operating System, also known as Microsoft DOS) is an operating system for x86-based personal computers mostly developed by Microsoft.

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MVS

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

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Operating system

An operating system (OS) is system software that manages computer hardware and software resources, and provides common services for computer programs.

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Print Screen

Print Screen (often abbreviated Print Scrn, Prnt Scrn, Prnt Scr, Prt Scrn, Prt Scn, Prt Scr, Prt Sc, Pr Sc, or PS) is a key present on most PC keyboards. System request and Print Screen are computer keys.

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Scroll Lock (⤓ or ⇳) is a lock key (typically with an associated status light) on most IBM-compatible computer keyboards.

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SK Hynix

SK hynix Inc. (에스케이하이닉스 주식회사) is a South Korean supplier of dynamic random-access memory (DRAM) chips and flash memory chips.

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Software

Software consists of computer programs that instruct the execution of a computer.

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System console

One meaning of system console, computer console, root console, operator's console, or simply console is the text entry and display device for system administration messages, particularly those from the BIOS or boot loader, the kernel, from the init system and from the system logger. System request and system console are out-of-band management and system administration.

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References

[1] https://en.wikipedia.org/wiki/System_request

Also known as Sys Req, Sys Rq, Sys req key, Sys rq key, SysRQ, SysReq, SysReq key, SysRq key, System request key.

System request, the Glossary

Table of Contents

See also

Computer keys

IBM personal computers

Out-of-band management

References