1. An operating system developed by Bill Gates for personal computers
   - MS-DOS

Type of: disk operating system, DOS

• Alsatia
• alsatian
• Arctocephalus philippi
• Arctonyx
• Arctonyx collaris
• arctophile
• Arctostaphylos
• Arctostaphylos alpina
• Arctostaphylos andersonii
• Arctostaphylos manzanita
• Arctostaphylos tomentosa
• Arctostaphylos uva-ursi
• Arctotis
• Arctotis stoechadifolia
• Arctotis venusta
• Arcturus
• arcuate
• arcuate artery
• arcuate artery of the kidney
• arcuate vein of the kidney
• arcus
• arcus senilis
• arcus zygomaticus
• ARDA
• Ardea