A bit is either a 0 or a 1.
Know that quantities of bytes can be described using prefixes. Know the names, symbols and corresponding values for the decimal prefixes:
Students might benefit from knowing that historically the terms kilobyte, megabyte, etc have often been used to represent powers of 2.
The SI units of kilo, mega and so forth refer to values based on powers of 10. When referring to powers of 2 the terms kibi, mebi and so forth would normally be used but students do not need to know these.
|One extended-ASCII character in a text file (eg 'A')||1 byte|
|The word 'Monday' in a document||6 bytes|
|A plain-text email||2 KB|
|64 pixel x 64 pixel GIF||12 KB|
|Hi-res 2000 x 2000 pixel RAW photo||11.4 MB|
|Three minute MP3 audio file||3 MB|
|One minute uncompressed WAV audio file||15 MB|
|One hour film compressed as MPEG4||4 GB|