Two different sets of Arduino help references:

Case #1 By going to search Google "Arduino" and then to the Arduino - Home page then selecting reference then extended reference The following functions commands appear.

[Bits and Bytes] lowByte() highByte() bitRead() bitWrite() bitSet() bitClear() bit()

Case #2 Under Arduino Sketch ver 14 help/reference this links comes up which does not include the above commands/functions file:///C:/arduino/arduino-0014-win/arduino-0014/reference/Extended.html

Why are there two sets of references that are not the same?

:( >:( >:(

Sorry, the included reference tends to get a bit out of date.