1. Esa (name, not an abbreviation) is Italian rapper Francesco Cellammaro, also known as El Presidente, also part of Gente Guasta.

2. Podcasts tagged with "artist" ESA usually refer to the European Space Agency, although they may originate from third parties.

3. ESA (capital letters, for Electronic Substance Abuse) is a UK-based industrial/electronic project of Jamie Blacker, who now also works with Unter Null.

Electronic Substance Abuse was born in 2004 in order to try and make the transition from one extreme independent music genre to another. E.S.A. was also born to make the dancefloor a slightly less pleasant place to be and to create an unbearable sense of darkness and overall not niceness ;-) Originally J.Blacker, sole member of ESA was part of the underground black metal scene in England releasing demo's and touring the stench filled rock club circuit for four years. A decision to walk a variation of the left hand path was taken and after being seduced and drawn in by rhythmical noise acts such as Converter and Sonar... He made an exit from the BM and DM scene to develop his own style of harsh yet intelligent electronic music. After playing live alongside many of the genre's finest including 'Scrap edx' and 'Mimetic', a signing was made to Hive Records in early 2006 and now the long awaited debut album has finally been released. 'Devotion Discipline and Denial' is dark, suffocating, harsh and seductive Industrial music that twists and churns through beat orientated dancefloor noise to breathtakingly dense ambience. ESA will keep developing, utilizing different styles and vocalist genres to blanket under the bleak cover of ESA in order to make darker and harsher electronic music.