Is it? Outside of Windows, I rarely ever see KB used to mean 1024 anymore. Linux and Mac usually uses KB for 1000, and "K" or "Ki" or "KiB" for 1024.
KiB is a an abbreviation for "kilobyte" which emphasizes that it means 1024.
KiB is a an abbreviation for "kilobyte" which emphasizes that it means 1024.