LED was a programmer's editor by Norsk Data

Norsk Data

Norsk Data was a computer manufacturer located in Oslo, Norway. Existing from 1967 to 1992, it had its most active period in the years from the early 1970s to the late 1980s...

 running on the ND-500

ND-500

The ND-500 was a 32-bit superminicomputer delivered in 1981 by Norsk Data. It relied on a ND-100 to do housekeeping tasks and run the OS, SINTRAN III.A configuration could feature up to four ND-500 CPUs, in a shared-memory configuration....

 series of computers running SINTRAN III

SINTRAN III

SINTRAN III was a real-time, multitasking, multi-user operating system used with Norsk Data computers from 1974. Unlike its predecessors SINTRAN I and II, it was entirely written by Norsk Data....

.

It featured automatic indenting, pretty-printing of source code

Source code

In computer science, source code is text written using the format and syntax of the programming language that it is being written in. Such a language is specially designed to facilitate the work of computer programmers, who specify the actions to be performed by a computer mostly by writing source...

, and integration with the compiler

Compiler

A compiler is a computer program that transforms source code written in a programming language into another computer language...

 environment.

It was sold as an advanced alternative to PED

PED

-Acronyms:* Performance-enhancing drugs, substances designed to enhance the metabolism of the human body in certain medical situations* Platform edge doors, another term for Platform screen doors* Price elasticity of demand in economics...

.

There are several remaining copies, and it is installed on the NODAF public access ND-5700.