A device containing a large number of logic gates that can be interconnected internally by the user of the device to form an application-specific circuit.

Technique for a test-implementation of ICs or for production of very small series. The circuits are burnt into a matrix of transistors. HDL

A high-density (that is, containing more than 1,000 gates) programmable-logic chip containing small logic cells interconnected through an array of programmable switches. FPGAs can implement thousands of gates of logic in a single IC and can be programmed by users at their site in a few seconds or less depending on the type of device used. FPGAs are popular for prototype development, custom computing, digital signal processing, and logic emulation.

An integrated circuit (IC) that can be programmed in the field after manufacture.

A logic chip that has thousands of internal gates and can be programmed. Abbreviated FPGA. FPGAs are especially popular for prototyping integrated circuit designs. However, once the design is finalized, hard-wired chips called ASICs are often used instead for their faster performance and lower cost. [ more] The internal structure of an FPGA.