Definitions by NBNoG

JSC 

Just Common Sense

JSC...Duh

JSC by NBNoG May 19, 2009

JCS 

Just Common Sense

JCS...duh

JCS by NBNoG May 19, 2009

sentinel 

An outpost of understanding/cognizance/warning

Clarke's "The Sentinel"-1948
and "2001"

sentinel by NBNoG April 29, 2008