Did I miss it? SWMBO = "She Who Must Be Obeyed"
That cleartext comes to me eventually, but after Single White Male w/ Body Odor...
Here are some more, referring to phono cartridges:
MM - Moving Magnet - a cartridge design where the magnet is attached to the cantilever and moves with the stylus, while the coils are fixed in place.
MC - Moving Coil - a cartridge design where the coils are attached to the cantilever and move with the stylus, while the magnets are fixed in place.
MM cartridges are the most common type, usually with replaceable styli - actually assemblies of stylus, cantilever, and magnet.
MC cartridges do not have user-replaceable styli, because removing the stylus/cantilever/coil assembly would break the tiny coil wires.
MI - Moving Iron - a cartridge design where both magnets and coils are fixed in place and a stylus/cantilever/iron assembly moves.
HOMC - High Output Moving Coil - MC with output above 1 mV, enough to drive a typical MM phono section without a step-up device.
LOMC - Low Output Moving Coil - MC with output below 1 mV, requiring a step-up device to be used with typical MM phono sections.
step-up device - an amplifier or transformer that goes between the cartridge and a typical MM phono section - either a head amp, or SUT
head amp or pre-preamp (PPA) - an active (powered) amplifier for LOMC cartridges, enabling their use with a typical MM phono section, often battery powered
SUT - Step-Up Transformer - a transformer used to increase the voltage of a LOMC cartridge passively, without powered amplification
Also:
TVC - Transformer Volume Control - an attenuator built without resistors or potentiometers, by using a step-down transformer with multiple taps, one for each desired volume setting. Also refers to a passive preamp combining source selection with TVC attenuation.
EQ - EQualization - the intentional alteration of frequency response. The most typical EQ are tone controls. Fancier equalizers used as tone controls have multiple bands ("graphic" equalizers, where the slider positions draw a crude frequency response graph), or are parametric, with center, width, and height controls for one or more user-configurable bands. All phono preamps have an equalization circuit built in, to attenuate the (pre-boosted) treble and boost the (pre-attenuated) bass used of necessity when cutting the record masters. This usage of equalization may be the origin of the term - to make the bass and treble equal again.
RIAA Curve - before being known for lawsuits, the RIAA (Record Industry Association of America) was best known for standardizing record EQ between manufacturers with the "RIAA curve". All phono preamps implement the inverse of the RIAA curve as an essential part of their functionality.