Explore a comprehensive 5-hour tutorial series on number systems, covering conversions between binary, decimal, hexadecimal, and octal representations. Learn techniques for converting between various number bases, including using Excel for efficient calculations. Dive into advanced topics such as Binary Coded Decimal (BCD), ASCII code, Gray code, and binary arithmetic with negative numbers. Master the fundamentals of number systems, including addition and subtraction in binary, and gain a solid understanding of their applications in computer science and digital electronics.