Gerald Lee Harris SSA application

I finally got his application today. My husband always thought his grandpa and grandma married at a very young age and left Ar earlier than this but on the app it's showing that at 20 years old he's still living in Okolona and single.

Date of application 1/15/41
Date of last full time job ended 9/26/40
Place of employment: C.C.C. (anyone know what c.c.c. is?)
Fathers full name: Kennon Lee Harris
Mothers full name before marriage: Manie Lou Cloud

I would sure like more info on Kennon Harris' family. I'll have to send away for his ssa next.