Penta (also known as [TRMC]) were a Swedish electronic music duo consisting of Tobias Jakobsson and Simon Rahm (aka Psilodump), from Stockholm, Sweden.

Formed in 1995, it was their first collaborative effort.

They later formed other music projects, such as Cut ‘n’ Paste 604, Jakan BambaBong, Industrial Meditation and Acid Twins.

In 1997, Penta was renamed [TRMC], The Raving MassConfusion.