Multilevel models (also known as hierarchical linear models, linear mixed-effect models, mixed models, nested data models, random coefficient, random-effects models, random parameter models, or split-plot designs) are statistical models of parameters that vary at more than one level.

Multilevel security or multiple levels of security is the application of a computer system to process information with incompatible classifications (i.e., at different security levels), permit access by users with different security clearances and needs-to-know, and prevent users from obtaining access to information for which they lack authorization.

In computer science, a multilevel feedback queue is a scheduling algorithm.

The MultiLevel Coach is a bi-level passenger rail car for use on commuter rail lines.

Downtown Chicago, Illinois, has some double-decked and a few triple-decked streets immediately north and south of the Main Branch and immediately east of the South Branch of the Chicago River.

One application of multilevel modeling is the analysis of repeated measures data.