A7r5 stands for Smooth Muscle Cell Line
A4RE stands for Act 4 Radical EuropE
A7X stands for Avenged Sevenfold (band)
A5 stands for Automatic Five Speed
A4Y stands for Advocates for Youth
A4P stands for Action for Paradise (Germany)
A4X stands for Aiming for Excellence (UK)
A4L stands for Arts for Learning
A4WP stands for Alliance for Wireless Power (Fremont, CA)
A4VB stands for Alliance for Virtual Businesses