CS

Initialism of computer science.

Initialism of coronary sinus.

Initialism of cocksucker.

Initialism of customer service.

Initialism of controlled substance.

Initialism of child support.

Initialism of caught stealing (especially as a statistic).

Initialism of circuit-switched.

Initialism of chief superintendent.

Initialism of Coma scale, often the Glasgow Coma Scale.