What is PL/I written in?
PL/I is a procedural, imperative computer programming language, first released in 1964.
Implementation
| Layer | Written in | Notes |
|---|---|---|
| Compiler | Assembly (since 1964) | Early PL/I compilers for IBM System/360 written in assembly |
Compiler implementation
The PL/I compiler, written in Assembly, translates PL/I source code into an executable or intermediate format. The choice of implementation language affects the compiler's portability, build-time dependencies, and the path toward PL/I eventually becoming self-hosting.
Many language compilers are written in C or C++ for maximum portability and performance. When a compiler is written in a higher-level language, it can leverage that language's abstractions for clearer compiler code, at the cost of a longer bootstrap dependency chain.
Explore in the Graph
See PL/I's full lineage, including all implementation and influence relationships, in the interactive graph.
Open Interactive Graph →Or view the PL/I language page for the complete record.