HARQ stands for Hybrid Automatic Repeat Request, a technique used in telecommunications to improve data transmission reliability. There are several synonyms for the term HARQ, including error-correction, feedback-based retransmission, and adaptive modulation. HARQ allows for data transmission errors to be corrected on the fly, ensuring that the receiver obtains complete and accurate information. The technique is widely used in mobile telephony, Wi-Fi, and satellite communications. HARQ is an essential technique for reliable transmission, used across a wide spectrum of applications, from online gaming to medical telemetry. By ensuring that data is correctly transmitted and received, HARQ provides valuable benefits in terms of network efficiency and end-user experience.