The article introduces Software Defined Radio (SDR) as using software for traditional hardware signal processing tasks in radio/RF applications. SDR devices allow receiving and transmitting RF signals via antennas connected to computers, often featuring both reception and transmission capabilities. The text serves as a practical guide to Digital Signal Processing (DSP), SDR, and wireless communication, focusing on visual aids rather than extensive mathematical derivations, making it accessible for those with basic programming skills seeking employment in related fields.