OpenGrenton (OpenGr8on) open source extensions to systems based on Grenton devices (https://grenton.com)
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Updated
Dec 9, 2025 - Java
CLU was the first implemented programming language to provide direct linguistic support for data abstraction. CLU contains a number of other interesting and influential features, including checked exceptions, iterators, and parametric polymorphism.
OpenGrenton (OpenGr8on) open source extensions to systems based on Grenton devices (https://grenton.com)
Created by Barbara Liskov et al.
Released 1975