What does VRM stand for?

Voltage Regulator Mechanism

Volume Retvntion Manager

Volunteer Pesources Management

Volunteer Resource Management

Voter Registration Modernization

Variation Risk Management

Vermiculite

A mineral used as bulk insulation and also as aggregate in insulating and acoustical plaster and in insulating concrete floors. An expanded mineral used as lightweight aggregate in concrete and other filling applications. Minerals similar to mica which expand greatly when heated; used in the expanded state for heat insulation. 

Visitor Relationship Management

Voltage Regulator Module

Variable Range Marker