AO Software Design Book
| ACD | Alignment, Calibration and Diagnostics |
| ACS | Active Control System, the Keck primary mirror control system |
| AO | Adaptive Optics |
| APD | Avalanche Photo Diode |
| DCS | Drive Control System |
| DM | Deformable Mirror |
| EPICS | Experimental Physics and Industrial Control System |
| GS | Guide Star |
| IDL | |
| KTL | Keck Task Library |
| LS | Laser Subsystem |
| LGS | Laser Guide Star |
| LGS Facility | AO system INCLUDING Laser Subsystem |
| NGS | Natural Guide Star, can be used with either NGS or LGS Facilities |
| NGS Facility | AO system WITHOUT Laser Subsystem (i.e. dependent on NGS) |
| NIRC-II | Near Infrared Camera II, One of the Science Instruments using AO |
| NIRSPEC | Near Infrared Spectrometer, one of the Science Instruments using AO |
| NTFS | Natural Tilt/Focus [guide] Star, used with LGS Facility |
| OA | Observing Assistant |
| OBS | Optics Bench Subsystem |
| PLC | Programmable Logic Controller - Laser Subsystem |
| SC | Supervisory Controller |
| SCC | Software Coordination Committee |
| SO | Science Object |
| TBD | To Be Determined |
| T/FS | Tilt / Focus Sensor |
| TTM | Tip / Tilt Mirror (aka. fast steering mirror) |
| UAE or uae | Universal Application Environment |
| UI | User Interface |
| UISC | User Interface / Supervisory Control Subsystem |
| VMM | Vector Matrix Multiplier (aka. Wavefront Reconstructor) |
| WFC | Wavefront Controller Subsystem |
| WFS | Wavefront Sensor |
| ACAM | Acquisition Camera |
| AFM | Acquisition Fold Mirror |
| AFS | Acquisition Camera Focus Stage |
| DCAM | Diagnostic Camera |
| DFM | Diagnostic Fold Mirror |
| ENV | Environmental Sensors |
| FCS | WFS Focus Stage |
| FSM | Field Steering Mirrors |
| FSP | WFS Field Stop |
| FSS | WFS Field Stop Stage |
| IDC | Infrared Atmospheric Dispersion Corrector |
| IDCS | Infrared Atmospheric Dispersion Corrector in/out Stage |
| INT | DM Interferometer |
| IRD | Infrared transmissive Dichroic |
| ISM | Science Instrument Fold Mirror (aka Instrument Selection mirror) |
| NCAM | NIRC-2 Alignment Camera |
| ROT | Image Rotator |
| SFM | Telescope Simulator Fold Mirror |
| SFP | Telescope Simulator Field Positioner |
| SFS | Telescope Simulator Focus Stage |
| SOD | Sodium Dichroic |
| SPM | Telescope Simulator Pupil Mask |
| SWP | Telescope Simulator White Light Power |
| TSS | Tilt/Focus Sensor XYZ Stage |
| VDC | Visible Atmospheric Dispersion Corrector |
| WCS | WFS Camera Stage |
| WLS | WFS Lenslet Stage |
| WPS | WFS Pupil Relay Lens Stage |
| WWP | WFS White light Power |
| CCO | Coma Off-loading from DM to Telescope Secondary, with DML Closed |
| CSTO | Segment Tilt Off-loading from DM to ACS, with DML Closed |
| CWFO | Focus off-loading from DM to telescope secondary (DM loop closed) (Note: CWFO is intended to stand for Closed loop WFS Focus Off-loading) |
| DML | Deformable Mirror Loop (aka WFS-DM Loop) |
| FSO | Focus off-loading from T/FS to WFS focus stage (Note: FSO is intended to stand for Focus Sensor Off-loading) |
| LIDC | IR ADC beam deviation compensation using TSS for LGS mode. (Note: LIDC is intended to stand for LGS mode Infrared atmospheric Dispersion Corrector Compensation) |
| LFPC | LGS focus position compensation using WFS offset vector |
| LNFC | Nirc-2 focus compensation using the TSS, LGS mode (Note: LNFC is intended to stand for LGS mode Nirc-2 Focus Compensation) |
| LNTC | Nirc-2 Translation compensation using TSS, LGS mode (Note: LNTC is intended to stand for LGS mode Nirc-2 Translation Compensation) |
| LVDC | Visible ADC beam deviation compensation using TSS for LGS mode. (Note: LVDC is intended to stand for LGS mode Visible atmospheric Dispersion Corrector Compensation) |
| NIDC | IR ADC beam deviation compensation using WFS offset vectors for NGS mode. (Note: IDCC is intended to stand for Infrared atmospheric Dispersion Corrector Compensation) |
| NNFC | Nirc-2 focus compensation using the WFS focus stage, NGS mode (Note: NNFC is intended to stand for NGS mode Nirc-2 Focus Compensation) |
| NNTC | Nirc-2 Translation compensation using WFS offset vectors, NGS mode (Note: NNTC is intended to stand for NGS mode Nirc-2 Translation Compensation) |
| NVDC | Visible ADC beam deviation compensation using WFS offset vectors for NGS mode. (Note: NVDC is intended to stand for NGS mode Visible atmospheric Dispersion Corrector Compensation) |
| OCO | Coma Off-loading from WFS to Telescope Secondary, with DML Open |
| OSTO | Segment Tilt Off-loading from WFS to ACS, with DML Open |
| OWFO | Focus off-loading from WFS to telescope secondary, DM loop open (Note: OWFO is intended to stand for Open loop WFS Focus Off-loading) |
| PMON | Performance Monitor |
| PRC | Pupil Rotation Compensation |
| TAT | Time Average Tilt |
| TTL | Tip / Tilt Loop (aka WFS-TTM Loop or T/FS-TTM Loop) |
| TTDML | TTL and DML taken together |
| TTO | Tilt Off-loading from TTM to DCS (Note: TTO is intended to stand for Tip Tilt Off-loading) |
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