A4WD
A4WD stands for All Wheel Drive (automotive)
A4M
A4M stands for American Academy of Anti-Aging Medicine
A4VB
A4VB stands for Alliance for Virtual Businesses
A4WP
A4WP stands for Alliance for Wireless Power (Fremont, CA)
A4L
A4L stands for Arts for Learning
A4X
A4X stands for Aiming for Excellence (UK)
A4P
A4P stands for Action for Paradise (Germany)
A4Y
A4Y stands for Advocates for Youth
A5
A5 stands for Automatic Five Speed
A7X
A7X stands for Avenged Sevenfold (band)