Electronic design automation (EDA) and electronic computer-aided design software (ECAD) is used to design and develop electronic systems such as printed circuit boards (PCBs) and integrated circuits (ICs).
Embedded systems software is designed to support a special-purpose computer system. It has a single dedicated function or a small number of dedicated functions, often with real-time performance constraints.
Technology computer-aided design software (TCAD) is used to simulate the fabrication process (but not the behavior) of semiconductor devices. TCAD software helps to optimize the semiconductor fabrication process and provides 2D modeling.