There are multiple artists named Em:

1) eM is solo space ambient project of Michael Bentley, producing contemplative abstractions bathed in an inviting, dream-like warmth.

2) Em is a Polish rock band formed in autumn 1993. Founder is Mariusz Dalecki. The first year of eM is the year of tuning guitars. Later, there was a higher shelf: tuning the instruments to each other. Today Mariusz says he was the first name, and then skills. Attention was this rather unusual name of the band.

3) Around 1980 eM (Menko Konings) started the legendary Dutch underground formation S.M. Nurse. S.M. Nurse experimented with collage-like music and were inspired by N.Y.-ultra, disco e.g. The band mainly performed in the Amsterdam ultra-circuit, such as Oktopus on the Keizersgracht and D-Day in Paradiso. They also performed at clubs and discotheques such as Mazzo on the Rozengracht and the transgender nightclub Madame Arthur in the Warmoesstraat.
Pretty soon, S.M. Nurse was noticed by radio programme maker Richard Zeilstra from the Dutch broadcaster the VPRO and they were played regularly on radio programmes such as RadioNome and Spleen. They performed live on radio in the villa of the VPRO in Hilversum. They also contributed to the theme cassette Turkish Delight of van Kaye & Ignit's record label Ding Dong Records. Among releases were a live registration on a bootleg cassette, at the time available at Staalplaat, and a cassette of S.M. Nurse on the independent label Top Tape.
At the end of 1983, S.M. Nurse split up. Menko Konings continued solo under the name eM. He also started the formation No Honey from These with Robby Horsfall. Top Tape released several cassettes and CD's from eM as well as No Honey From These.
Main inspiration: B-movies, funk, The Velvet Underground, The Stooges and, most of all, SUICIDE (Martin Rev & Alan Vega)

http://www.reverbnation.com/em1
http://www.facebook.com/pages/eM/196695420345240
http://www.myspace.com/561251329