Old shell Synonyms

Old replaced

familiar shell

Definitions for Old

(adjective) being of advanced years and especially past middle age
(adjective) dating or surviving from the distant past
(adjective) having been such at some previous time

OS abbreviation

OS is an abbreviation for Old Shell

What does OS stand for?

OS stands for "Old Shell"

Shell replaced

old cartridge

Definitions for Shell

(noun) something that encloses another thing especially to protect it
(noun) the arrangement of parts that gives something its basic form
(noun) an outer part or layer