<sod>  As an acronym '''CID''' can refer to (in alphabetical order):
 * Telephone [[Caller ID]].
* [http://dc.ipc.org/education/eduhome.htm Cirtified Interconnect Designer]
 * [[CVV2|Card Identification Number]], a security feature on [[American Express]] credit cards.
 * A [[charge-injection device]] which is a light-sensor based on [[photodiode]]s.
 * [[CID fonts]].
 <eod> <sod> As an acronym '''CID''' can refer to (in alphabetical order):
 * Telephone [[Caller ID]].
* [[C.I.D.+|Certified Interconnect Designer]]
 * [[CVV2|Card Identification Number]], a security feature on [[American Express]] credit cards.
 * A [[charge-injection device]] which is a light-sensor based on [[photodiode]]s.
 * [[CID fonts]].
 <eod>