Digital Logic
Bit
The smallest unit of digital information, representing a single binary value of 0 or 1.
Detailed Explanation
A bit (binary digit) is the fundamental quantum of digital information. Physically, a bit might be represented by voltage levels (0V vs 3.3V), charge storage (in DRAM), magnetic orientation (in hard drives), or optical properties (in fiber).
Groups of bits form larger data types: 4 bits (nibble), 8 bits (byte), 16/32/64 bits (word, varies by architecture). Bit manipulation operations (AND, OR, XOR, shift) are fundamental to low-level programming and hardware design.