The meaning of the Acronym SM is...

SM is

• Sub Manager
• Supreme Master
• Single Mom
• Safety Management
• Stage Manager
• Salvage Mechanic

More Meanings For SM:

• Simple Mainloop
• Shell Model
• Maillist (SoftSpoken Mailer)
• Script (ScriptMaker)
• Smalltalk language source code file
• Text document (Samna Word)
• Set Mode
• Software Modem
• Shared Memory
• System Manager
• Super Mini
• Spell Menu
• Scheduler Message
• Small Machine
• Smart Media

SM is also in:

• Assembly
• File Extensions
• General
• Hardware