The text discusses the designing of field-programmable gate array-based green computing circuits for efficient green communication. It will help senior undergraduate, graduate students, and academic researchers from diverse engineering domains such as electrical, electronics and communication, and computer. Discusses hardware description language coding of green communication computing (GCC) circuits Presents field-programmable gate arrays-based power-efficient models Explores the integrations of universal asynchronous receiver/transmitter and field-programmable gate arrays Covers architecture and programming tools of field-programmable gate arrays Showcases Verilog and VHDL codes for green computing circuits such as finite impulse response filter, parity checker, and packet counter The text discusses the designing of energy-efficient network components, using low voltage complementary metal-oxide semiconductors, high-speed transceiver logic, and stub series-terminated logic input/output standards. It showcases how to write Verilog and VHDL codes for green computing circuits including finite impulse response filter, packet counter, and universal asynchronous receiver-transmitter.