USA and Asia :
This is the by far most commonly used abbreviation method. For example it is used by Taiwan Alpha, Hongh, Alps, Partsland, Bourns, Omeg, CTR, MEC, Fender and PEC.
A = logarithmic (also called 'positive logarithmic', 'audio', 'log' or '+ log')
B = linear ('lin')
C = negative logarithmic (also called 'reverse log', 'rev log', 'reverse audio', or '- log')
This is rarely used today, for example by Piher.
A = linear (lin)
B = logarithmic (also called 'positive logarithmic', 'audio', 'log' or '+ log')
Y = negative logarithmic (also called 'reverse log', 'rev log', 'reverse audio' or '- log')
Mono = one potentiometer section, one axis
Stereo or Tandem= two potentiometer sections, one axis
Duplo or Concentric = two potentiometer sections, two axes
Stacked = multiple potentiometer sections, one or two axes
Switched = one or multiple potentiometer sections, one or two axes. With switch.
Some pots have a multi-digit code (usually 6 or seven digits) printed on it used to identify the manufacturer and manufacturing date.
The first 3 digits on the pot identify the manufacturer. The other 3 or 4 digits identify the manufacturing date. In 3 digit dates code, the 1st digit is the last digit of the year. In 4 digits date codes, the 1st and 2nd digits are the last two digits of the year. The last two digits are always the week of manufacture (01 to 52).