ABEL (hardware description language)

ABEL (Advanced Boolean Expression Language) is a hardware description language developed by Data I/O Corporation in the early 1980s for designing and programming programmable logic devices such as PALs and GALs. ABEL allows a designer to specify digital logic using Boolean equations, truth tables or state diagrams, which the ABEL compiler then translates into a fuse map or JEDEC file for programming the target device. ABEL was widely used in the 1980s and 1990s before largely being superseded by VHDL and Verilog for more complex programmable logic and FPGA designs.