What does BCD stand for in terms of digit representation?

BCD stands for Binary Coded Decimal, which is a class of binary encodings of decimal numbers where each digit of a decimal number is represented by its own binary sequence. This encoding technique is particularly useful in digital systems where the precision of decimal representation is necessary, such as in calculators, digital clocks, and other devices that interact with users in decimal format.

In Binary Coded Decimal, each decimal digit (0-9) is represented by a four-bit binary number. For example, the decimal number 25 would be represented in BCD as 0010 0101, where 0010 represents the digit '2', and 0101 represents the digit '5'. This method allows for easier manipulation and display of decimal numbers in electronic devices, as it maintains a clear distinction between each digit.

Understanding BCD is fundamental in digital electronics and computing, particularly when it comes to interfacing and processing human-readable numeric data.