The basic ideas of digital and analogue systems, as well as their benefits, are covered in this course's introduction to digital systems. Boolean algebra, number systems, basic logic operations, and the simplification of Boolean expressions are all included. Adders, subtractors, encoders, decoders, multiplexers, flip-flops, counters, and shift registers are among the combinational and sequential logic circuits covered in the course. Practical applications and design issues are emphasised.