[1] Consumers Information Service (of CompuServe)

[2] Computer Informations-System(e) (Nonstandard-Datenbanken)

[3] Chef/Communications Informations System(e)

[4] Character Instruction Set

[5] Canadian Institute of Surveying

[6] Compressed Image Sequence (in XIL)

[7] Card Identification Structure

[8] Card Information Structure (PCMCIA)

[9] Commonwealth of Independent States

[10] Customized Intercept Service

[11] Canton Islands.