A kilobyte (KB) is a unit of digital information storage that represents 1,024 bytes in the binary numbering system. However, in some contexts, it is also used to represent 1,000 bytes in the decimal system, especially in the context of data transfer rates and storage capacities, following the metric system convention.
Originally, a kilobyte was defined as 1,024 (2^10) bytes because computers primarily use binary systems where data is measured in powers of 2. But due to the discrepancy between the binary and decimal systems, in the International System of Units (SI), kilo generally refers to 1,000 (10^3) units. This led to some confusion regarding the exact size of a kilobyte.
The computing power that got man to the moon in 1969 was a mere 64KB!