Abbreviations and acronyms

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This page lists many abbreviations, acronyms and initialisms that are used frequently to communicate more quickly, but can confuse new players or players who are not familiar with them.

AGU
Advanced Grabbing Unit
Ap
Apoapsis, highest point in an orbit.
B9
B9 Aerospace addon
BTSM
Better than starting manned, A popular game and tech tree overhaul.
CM
Command Module, a transfer ship that delivers a Lander Module to orbit around some body, then waits there and takes it completely or only the crew home again. Not to be confused with command modules.
CoL, COL
Center of Lift
CoM, COM
Center of Mass
CoT, COT
Center of Thrust
CTT
Community Tech Tree , A tech tree expansion used by many popular mods.
DRE
Deadly ReEntry - an addon, simulates the atmospheric entry heat effects.
dV, Δv
Delta-V, a measure of the ship's propulsive energy.
EPL
Extra-Planetary Launchpads, A unique mod which adds a variety of parts and minable resources used to build rockets away from the KSC.
EVA
ExtraVehicular Activity - making Kerbals leave the craft: spacewalks, landings, etc.
FAR
Ferram Aerospace Research - an addon, gives realistic aerodynamics.
GUI
Graphical User Interface
HKO
High Kerbin Orbit
HSC
Hitchhiker Storage Container - The a PPD-10 Hitchhiker Storage Container
ISP, Isp, Isp
Specific impulse, more accurately Isp but that's hard to do on the forum. A value where the higher one is more fuel efficient.
IVA
IntraVehicular Activity - the pod view and controls of an individual Kerbal.
KAS
Kerbal Attachment System - an addon, gives winches, struts and pipes that add to KIS
KER
Kerbal Engineer Redux - a diagnostic addon
KIS
A modthat allows for parts to be attached/moved/stored or otherwise manipulated on EVA, formerly KAS.
KSP
Kerbal Space Program!
KSPI-E
KSP Interstellar - Extended, A mod that adds abercurbie drives, antimatter and other Sci-Fi technologies for use in KSP
KSC
Kerbal Space Center
LES
Launch Escape System
LFB
Liquid Fuel Booster - like the LFB KR-1x2.
LKO
Low Kerbin Orbit
LM
Lander Module, paired with a Command Module and which lands on the body.
LMC
Left-Mouse-Click
MKS,OKS,UKS
Modular Koloniation System , A very popular mod made by roverdude which adds a variety of new base parts desingned to be used with EPL and/or USI-LS.
NEAR
Neophyte's Elementary Aerodynamics Replacement, an addon gives more realistic aerodynamics model, a simpler version of FAR.
NFT
Near Future Technology, a set of 5 part packs based off modern or very Near-Future technologies.
Pe
Periapsis, lowest point in an orbit.
RCS
Reaction Control System
RO
Realism overhaul, A complete overhaul of the KSP system to make it a highly realistic experience (Very advanced).
RSS
Real Solar System - an addon with solar system of our size...
RTG
Radioisotope Thermoelectric Generator
RUD
Rapid, Unplanned Disassembly. Usually happens when there are not enough struts or it collides with something. See also catastrophic failure.
SoI
Sphere of influence, which are the frames of reference. The trajectory in the current sphere of influence is shown blue on the map view.
SA
Sub-Assembly (in VAB/SPH)
SAS
Stability Augmentation System or (jokingly) Sickness Avoidance Solution/Scheme/System
SMA
Semi-Major Axis
SPH
Space Plane Hangar
SRB
Solid Rocket Booster
SSTO
Single-stage-to-orbit
TSTO
Two-stage-to-orbit
TVC
Thrust Vector Control
TWR
Thrust-to-weight ratio, must be greater than 1 to overcome gravity, unless already in space.
VAB
Vehicle Assembly Building
VTOL
Vertical take off and landing

See also