SP4

(1) (Service Pack 4) The fourth service pack introduced to upgrade a major release of software. See service pack.

(2) (Surface Pro 4) See Surface tablet.

SP4

A gene on chromosome 7p15.3 that encodes a protein which binds to GT- and GC-box promoter elements and may activate transcription.

SP4

Acronym	Definition
SP4➣Security Protocol Layer 4
SP4➣Specialist, Grade E4 (US Army)

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