Perhaps you are interested in the following logos.

AMP AMP vector
Digital Digital  vector
Erasco Erasco vector
Guardian Guardian  vector
laufer laufer vector
MAC MAC vector
MAPCO EXPRESS MAPCO EXPRESS vector
A&W A&W vector
AIU AIU vector
AMS Group Head Office AMS Group Head Office vector
ATO 213 ATO 213 vector
Ad-aware Ad-aware vector
Advent Software Advent Software vector
Airslide Systems Airslide Systems vector
Albani Albani vector