The language definition process first began in a meeting in 1985 in Paris and took several years.

Its main traits are that it is a Lisp-1 (no separate function and variable namespaces), has a Common Lisp Object System (CLOS) style generic-function type object-oriented system named The EuLisp Object System (TELOS) integrated from the ground up, has a built-in module system, and is defined in layers to promote the use of the Lisp on small, embedded hardware and educational machines.

The successor to FEEL was Youtoo (interpreted and compiled versions), by University of Bath in the United Kingdom.

[3] An interpreter for the basic level of EuLisp, level-0, was written by Russell Bradford in XScheme, an implementation of Scheme by David Michael Betz, originally named EuScheme EuScheme but the most recent version is renamed EuXLisp [1] to avoid confusion.

Also Eu2C [2], a EuLisp optimizing compiler, was created by Fraunhofer ISST under the APPLY project in Germany [3].