603 (disambiguation)

603 may refer to:


 * 603 (number), the natural number following 602 and preceding 604
 * 603 CE
 * 603 BC
 * Area code 603
 * IBM 603 Electronic Multiplier, the first mass-produced commercial electronic calculating device
 * PowerPC 603, a processor a part of the PowerPC 600 family
 * Socket 603, a motherboard socket for Intel Xeon processors
 * 603 Timandra, a minor planet
 * Tatra 603, a family car
 * Bristol 603, a 2-door saloon