IBPS RRB Office Assistant 20 Sep 2015 Paper

(3) The units of computer memory measurements are: 1 Bit = Binary Digit; 8 Bits = 1 Byte; 1024 Bytes = 1 KB (Kilo Byte); 1024 KB = 1 MB (Mega Byte); 1024 MB = 1 GB(Giga Byte); 1024 GB = 1 TB (Terra Byte); 1024 TB = 1 PB (Petabyte). So kilobyte is the smallest among the given units.