SID

The acronym SID can refer to:

Amílcar Cabral International Airport, Sal Island, Cape Verde
Standard Instrument Departure at airports, also referred to as “Departure Procedure” (DP)
an early-warning satellite in the TV series UFO
Sensory Integration Dysfunction
mSIN3 interaction domain, a transcription repression protein domain

Computing and consumer electronics

SID often appears as a computing / consumer electronics three-letter acronym:

MOS Technology SID, the Sound Interface Device used in the Commodore 64 home computer and its variants
“Security Identifier”
- Microsoft Windows: identifies a security principal or security group [1]
- SELinux: an opaque reference to a security context
Source Identification Code, as used on CD-ROMs
Symbolic Instruction Debugger, a debugger for CP/M
A story identifier which uniquely identifies an article on the discussion site Slashdot
Oracle database users may refer to a SID in at least two different contexts:
- the Oracle System Identifier, which labels a database instance and identifies a running database to the outer world
- a session identifier, used internally to refer to a user database session
System Identification Number Identifies an Analog, TDMA or CDMA system
Silence Insertion Descriptor, used in speech encoding, allows transmission of silence at a compressed rate
NGOSS Shared Information/Data Model, Definition of NGOSS’s common Information Model [2]