Initialism of intercostal space.
"The electronics ics in the workshop were neatly organized by component type."
plural of IC
"The course in physics and ics is challenging for many students who struggle with math problems."
Initialism of Indy Car Series, the premier open-wheel racing series in the United States.
"After winning his first race in ICS, the rookie driver was immediately promoted to the team's full-time lineup."