sys Req key - significado y definición. Qué es sys Req key
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Qué (quién) es sys Req key - definición

COMPUTER KEY
Sys rq key; Sys req key; Sysrq; Sys Rq; SysReq; SysReq key; SysRq; System Request; SysRQ; SysRq key; System request key; Sys Req

Key (music)         
  • ii-V<sup>7</sup>-I progression]] in C [[File:Ii-V-I turnaround in C.mid]]
TONIC NOTE AND CHORD OF A MUSICAL PIECE
Major key; Key (Music); Musical key; Major Key; Key of D; Musical keys; Key coloration; Key relationship; Musical Key; Music key; Minor-key; Minor–key; Major-key; Key of E
In music theory, the key of a piece is the group of pitches, or scale, that forms the basis of a musical composition in classical, Western art, and Western pop music.
Key (cryptography)         
PIECE OF INFORMATION IN CRYPTOGRAPHY
Cryptography/Key; Secret key; Encryption key; Cryptographic keys; Cryptographic key; Key (cryptology); Cryptovariable; Cryptovariables
A key in cryptography is a piece of information, usually a string of numbers or letters that are stored in a file, which, when processed through a cryptographic algorithm, can encode or decode cryptographic data. Based on the used method, the key can be different sizes and varieties, but in all cases, the strength of the encryption relies on the security of the key being maintained.
Natural key         
TYPE OF UNIQUE KEY IN A DATABASE FORMED OF ATTRIBUTES THAT EXIST AND ARE USED IN THE EXTERNAL WORLD OUTSIDE THE DATABASE
Domain key; Business key
A natural key (also known as business keyData modelling: What exactly is a Business Key? by Roy, Rajiv Max.

Wikipedia

System request

System Request (SysRq or Sys Req) is a key on personal computer keyboards that has no standard use. Introduced by IBM with the PC/AT, it was intended to be available as a special key to directly invoke low-level operating system functions with no possibility of conflicting with any existing software. A special BIOS routine – software interrupt 0x15, subfunction 0x85 – was added to signal the OS when SysRq was pushed or released. Unlike most keys, when it is pressed nothing is stored in the keyboard buffer.