Case #1 By going to search Google "Arduino" and then to the Arduino - Home page http://www.arduino.cc/ then selecting reference then extended reference http://arduino.cc/en/Reference/Extended 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?
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