ACS

American Chemical Society (Medical » Human Genome)

**** American Cancer Society (Medical » Physiology)

*** American Cancer Society (Medical » Oncology)

*** American Cancer Society (Community » Non-Profit Organizations)

** Affiliated Computer Services (Business » Firms)

* Administrative Computing Services (Business » General)

* Acute Coronary Syndromes (Medical » Physiology)

* Affiliated Computer Services, Inc. (Business » NYSE Symbols)

* American College Of Surgeons (Medical)

* Advanced Camera For Surveys (Governmental » NASA)

* Australian Computer Society (Computing » General)

* Army Community Service (Governmental » Military)

* Access Control System (Computing » Security)

* Access Control System (Governmental » Police)

* Attitude Control System (Governmental » NASA)

* Administration For Children's Services (Governmental » State & Local)

* Automated Commercial System (Business » International Business)

* Aerial Common Sensor (Governmental » Military)

* Automatic Class Selection (Computing » General)

* Anglo Chinese School (Academic & Science » Universities)

* Auxiliary Communications Service (Academic & Science » Amateur Radio)

* Alternate Character Set (Computing » Assembly)

* American Cocker Spaniel (Medical » Veterinary)

* American College Of Sofia (Academic & Science » Universities)

* Anti Chop System (Computing)

* Adjacent Channel Selectivity (Academic & Science » Electronics)