Programmable Logic Devices (PLDs) are components used to build reconfigurable digital circuits that can be modified to different applications or functionalities after manufacturing. They contain multiple logic elements like flip flops or AND gates that can be configured by the user as needed.
Compared to fixed logic devices, PLDs allow for more flexibility and simplify complex logic while also offering superior performance in certain cases. In order to program a PLD, the right software and language are required to accurately communicate with the technology.