I-f (also Interr-Ference) is the stage name of Ferenc E. van der Sluijs, a Dutch producer and DJ based in The Hague.

In 1997 he produced the track "Space Invaders Are Smoking Grass",[2] which became a huge underground dance hit and is often cited as an early example of electroclash.

[1] It introduced "old-fashioned verse-chorus dynamics to burbling electro in a vocodered homage to Atari-era hi-jinks" and is the "record widely credited with catalysing" the electroclash movement.

[1] The album Fucking Consumer was released in 1998 on the Disko B label, followed by The Man From Pack the next year.

1,[3][4] which has been cited by many, including Morgan Geist, as being the catalyst that brought renewed interest in Italo disco.