References: Number Systems and Binary Arithmetic

1. Binary number - Wikipedia - Comprehensive overview of binary number systems, positional notation, and arithmetic operations.

2. Two's complement - Wikipedia - Detailed explanation of two's complement representation and why it simplifies hardware design.

3. Gray Code - Wikipedia - Comprehensive reference on Gray code history, properties, and applications in rotary encoders and error correction.

4. Digital Design (6th Edition) - M. Morris Mano and Michael Ciletti - Pearson - The standard undergraduate textbook covering number systems, binary arithmetic, and two's complement representation in Chapters 1-2.

5. Binary Arithmetic - All About Circuits - A comprehensive free online textbook chapter covering binary addition, subtraction, and signed number representations with worked examples.