Glossary

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S
S
S&T
SAO
SAP
SAV
Say
SCG
SCI
SCP
SDR
Set
S-F
SFA
SI
SIG
SMM
SMO
SMU
SO
SOH
SON
SOS
SOW
SPK
Spl
SPO
SPS
Spy
SRI
SRP
SRR
SSE
SSO
SSR
STD
STI
STS
STU
STX
SUB
SYN
Spl
  • /S-P-L/ [abbrev, from Set Priority Level] The way traditional UNIX kernels implement mutual exclusion by running code at high interrupt levels. Used in jargon to describe the act of tuning in or tuning out ordinary communication. Classically, spl levels run from 1 to 7; "Fred's at spl 6 today" would mean that he is very hard to interrupt. "Wait till I finish this; I'll spl down then. " See also interrupts locked out.