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|
| abbr. |
Overpayments And Accounting Summary; option-adjusted spread (Alexander Matytsin); Office Automation System; Office for Advance Studies; Office of the Assistant for Study Support; Office of the Assistant Secretary; Old-Age Security |
| abbr., amer. |
on active service |
| abbr., avia. |
obstacle assessment surface; offensive avionics system; Ottawa Aviation Services; oceanic automation system; office automatic system; Oman aviation services; onboard authentication service; operational announcing system; optical access system; originating access situation; omnidirectional airspeed system; orbit adjust system |
| abbr., chem. |
oxygen activity sensor (MichaelBurov); oxygen TDA sensor (MichaelBurov); oxygen thermodynamic activity sensor (MichaelBurov) |
| abbr., chem., scient. |
Optimum Additive Solution |
| abbr., commun. |
Operator Assistant System |
| abbr., comp., net., IT |
Oracle Application Server |
| abbr., earth.sc. |
oasis; ocean and aquatic sciences; ocean atmospheric science, incorporated; Office of Oceanic and Atmospheric Services; Ohio Academy of Science; operational amplifiers; optoacoustic spectroscopy; oxygen activated sludge process |
| abbr., ed., scient. |
Office of Applied Studies; Online Assessment System |
| abbr., el. |
obstacle avoidance sensor; office applied software; optically activated switch; order administration system |
| abbr., file.ext. |
One-to-All Scatter |
| abbr., foreig.aff. |
Organisation of American States |
| abbr., immunol. |
oral allergy syndrome |
| abbr., IT |
Office Administration System |
| abbr., Makarov. |
orbiter aeroflight simulator |
| abbr., med. |
Office Of Applied Studies. Substance Abuse And Mental Health Statistics; Old Age Security; Oral Allergy Syndrome; Osmotically Active Substance; Ophthalmic Anesthesia Society |
| abbr., mil. |
Offensive Air Support; On Active Service; Operations Automation System; Organization of American States; Offensive Avionics Suite |
| abbr., oil |
optical absorption spectroscopy; organic analytical standard; over and short; overall size |
| abbr., space |
open access service; optical angle sensor; opt-acoustic signal; orbit adjust subsystem; orbiter atmospheric simulator |
| abbr., st.exch. |
Option Adjusted Spread; Option-Adjusted Spread (Maldivia) |
| abbr., tech. |
offshore access system |
| abbr., transp. |
Office of Aircraft Services |
| ecol. |
oxygen activated sludge |
| mil. |
occupied areas section; offensive air support; omnidirectional airspeed sensor; ordinary ammunition storage |
| tech. |
obstacle avoidance sonar; optical augmentation system; orbiter aero flight simulator; orbiter avionics system; output amplitude stability |
