Which acronym will you see mostly on a computer DOG DOP or DOS?

Actually, all of those are computer terms.

DOS is likely the most familiar acronym or abbreviation of those listed. DOS is short for Disk Operating System, and in today's usage, Denial of Service.

DOG can stand for Digitally Originated Graphic, Digital Operations Guide, or Digital Onscreen Graphic.

DOP can stand for:

Directory Operational Binding Management Protocol

Directory Operational Protocol

Data/Date Object Processed

Desktop Operating Procedure

Desktop Optimisation Pack (Microsoft)

Data-Oriented Parsing (computational linguistics)

Digital Offset Press

Degree of Parallelism (database management systems)