1. Short for interprocess communication, IPC is the ability of applications to share information and handle many requests at one time. An example of IPC is DDE (dynamic data exchange) where information modified in one application is automatically updated in another.
2. Short for instructions per cycle, IPC is a measurement of how many instructions a CPU can execute in a single clock cycle. IPC fluctuates depending on the needs and design of the software being run on the CPU. Modern high-performance CPUs can execute as many as 64 IPC.