Level 4

Level 4 or Level Four or Level IV may refer to:

Technology

 * Level 4, a level of automation in a self-driving car (see Autonomous car)
 * Level 4, the transport layer in the OSI model of computer communications

Gradation

 * Level 4 Biosafety level
 * Level 4 trauma center

Music

 * LVL IV album by Future Leaders of the World 2004
 * Level 4 (Globe album)

Other uses

 * Level 0 coronavirus restrictions, see COVID-19 pandemic in Scotland
 * STANAG 4569 protection level