[Guy 13]

Hi all Audio Circle members…
For some of us that their mother tong is not English (I am sure that I am not the only one here), most of the abreviations used in Audio Circle threads are Chinese for some of us… (Ha, ha…)
I tried to build up a list of all those abreviations; but maybe some of you can add some more of those (New to us) abbreviations and words.
I manage to figure out (All by myself) the meaning of some, but I might be wrong, therefore, please fell free to make any necessary corrections.
Thanks and have a nice day.
Guy 13

AC = Audio Circle.
Buffer = Buffer:  some sort of circuit be it SS or Tube based that evens up impedance mismatches between the source output and the amplifier circuit, usually without gain but some do have optional gain.  This is to attempt to add one less component that might change the signal characteristics.  Seems to be more commonly used among the SET/Tubed crowd.
Cap = Capacitor.
DAC = Digital Analog Converter.
DIY = Do It Yourself.
DSD =
FYI = For Your Information.
IMO = In My Opinion.
Iron = Transformer.
OTL = Output Transformer Less.
OCL (Output CapacitorLess) - which distinguishes OTL designs lacking an output coupling capacitor (directly coupled)
DC-OTL - which denotes a directly coupled design; synonymous with OCL
AC-OTL - which denotes an AC (capacitively) coupled design
Z-OTL - which denotes a small class of variants
OB = Open baffle/box.
PCM =
PM = Personal message.
PP = Push Pull.
PS = Power supply.
SACD = Super Audio Compact Disc.
SE = Single Ended.
SEP = Single Ended Parallel.
SEP = Single Ended Pentode.
SET = Single Ended Triode.
SS = Solid state (Transistor)
WPC = Watt Per Channel.
YMMV = Your Milage May Vary.

[oz_audio_todd]

Hey Guy,
Well theres a few that I didnt know 
but,
IMO      In My Opinion
SACD    Super Audio Compact Disc
Iron      Steel (?)

[Rclark]

Well, I don't know about you Guy 13 in Vietnam but the Chinese seem to have a handle on it.

Rclark in America

[Hank]

Good list, Guy 13
DSD = Direct Stream Digital

[Sparky14]

Let's see if I can help

DSD = Digital Source Direct (I think, nothing more than a digital signal)

PCM = percent milliRho, it is a measure of the reactivity of a nuclear reactor core. Can't say that I'd ever seen that used in a stereo aspect, but nuclear power would make for a pretty bad audio amp I would think.

[ichillpill]

PCM = Pulse Code Modulation?

[ted_b]

Let's see if I can help

DSD = Digital Source Direct (I think, nothing more than a digital signal)

PCM = percent milliRho, it is a measure of the reactivity of a nuclear reactor core. Can't say that I'd ever seen that used in a stereo aspect, but nuclear power would make for a pretty bad audio amp I would think.

Wrong on both counts unfortunately (at least in this context).  DSD is Sony's trademark for SACD's native format, and stands for, as seen above, Direct Stream Digital, a 1 bit recording codec.  PCM stands for Pulse Code Modulation and is the vast majority of digital audio standards, including redbook, DVD audio, etc.  We use the term PCM constantly in these forums.

[dheming]

To add a few more technical ones:

AC can also stand for Alternating Current.

PP can also stand for Polypropylene, a dielectric used in film caps.
FEP is a form of Teflon, a dielectric used in film caps.
PET is Polyester(Mylar), another dielectric used in film caps.

MKP refers to metallized polypropylene film caps.
MKS refers to metallized polyester(Mylar) film caps.
FKP refers to polypropylene film and foil caps.
FKS refers to polyester(Mylar) film and foil caps.

OCC refers to Ohno Continuous Casting, a method that makes metal wire with a single long crystal.
SPC refers to Silver Plated Copper wire.
Litz usually in reference to individually insulated stranded wire, but there's also Litz braiding geometries.

Coil refers to an inductor, used along with caps in crossovers.
XO short for crossover.
Sand refers to solid state parts in general.

WAF means Wife Acceptance Factor, usually in reference to the size and/or appearance of loudspeakers.

[chlorofille]

PITA - Pain In The Ass
IME - In My Experience
SAF - Spouse Acceptance Factor
OTOH - On the Other Hand
LR2- Linkwitz Riley 2nd order crossover
LR4 - Linkwitz Riley 4th order crossover

Good list, Buy 13