What do KB MB and GB mean?

These are all units for indicating size of digital memory or information bits. GB - Giga Byte MB - Mega Byte KB - Kilo Byte Gb - Giga bit Mb - Mega bit Kb - Kilo bit 1 Byte = 8 bits 1 Giga = 1000 Mega 1 Mega = 1000 Kilo