Definitions by Ravpaq
Optimus
The brand name Radio Shack used for most of there electronics sold from the early 1990's until late 2002 when radio shack changed over to name brands Such as RCA, Sony, Pioneer, etc...
Realistic
The brand name Radio Shack used for most of there electronics sold from the late 1960's until the early 1990's when the brand name was changed over to Optimus.