Marco Fiorito known as Kaos One, Don Kaos, Dottor K, Ahmad or simply Kaos (born June 11, 1971 in Caserta) is an Italian rapper, beatmaker, and writer. He began his career in 1986 in Milan, first as a breakdancer and writer, then as an MC, first in English and then in Italian. Kaos One is acknowledged as one of the forerunners of Italian Rap.

1980s and 1990s

A former writer, Kaos, with DJ Gruff and American MC Top Cat, formed the Fresh Press Crew in 1986, which also includes DJ Skizo and Sean Martin. Dre Love later joined the group, which was renamed Radical Stuff.

Kaos One

In 1989 Radical Stuff released their first single, "Let's Get Dizzy". In 1990, after releasing a second single, "I Guess You Know", Radical Stuff worked on a live album recorded in collaboration with jazz musicians Lo Greco Bros. The LP The Jazzy Rap Night Live was released in 1992, followed by the single "Summer Fever" (1993) and "On tha Run" (1994).

Kaos One

In 1993 Kaos collaborated with other artists, first with DJ Gruff in the album Rapadopa (with the song "Don Kaos") and then with "Hello, hello I hate the hard Full of Colle der Fomento".

Kaos One

Radical Stuff's second album, Hardaswallow, was released in 1994. Kaos began working to release his first album in Italian, named Fastidio (discomfort). It was released in 1996 with the collaboration of Neffa (credited as Piscopo), MDee, Loudy NCN and Sean. Kaos collaborated with Neffa again with two tracks on the disc Neffa & i Messaggeri della Dopa: "I Messaggeri Pt.1" and "I fieri B-Boyz."

Neffa collaborates on Fastidio, and produced most of the tracks on the disc (one of them with Kaos).

After his solo debut he continued collaborations with different artists and in 1997, he appeared on Chief & Soci's Gruff Zero Stress.

Also in 1997, the Kaos appeared on the soundtrack for the film Torino Boys with the song "Quando vengo a prenderti", and on the Neffa album 107 elementi on the song "Strategie dell'universo".

The following year he released an album containing remixes of the tracks on Fastidio, titled "Kaos '98 Remix".

In 1999 he released "Cose preziose", which was added to Novecinquanta Fritz Da Cat, with Sean and Chico MD of Sangue Misto group Melma & Merda, with whom he released the album Merda & Melma.

In the same year -/-/-/-/- L'attesa was released, in collaboration with Freaktons, as well as producers Chico MD and Neffa, and Kaos.