The idea that software written today should run tomorrow. [Bitrot, coderot](https://en.wikipedia.org/wiki/Software_rot), etc. are terms that describe what happens to unmaintained software that "deteriorates" over time as it's execution environment moves on. External dependencies such as dynamically linked libraries or even deep system-level interfaces (such as syscalls) may all change and cause performance or complete failure of execution. Generally also applies to data and other forms of digital content that may become otherwise unusable as time passes. The [100r](https://100r.co/site/home.html) project is a effort to create sustainable software.  The above video is a talk at Strange Loop 2023 by Devine Lu Linvega, one of the creators of 100r that covers their approach to software and computing sustainability. *Old is not necessarily bad. It's unchanging. Frozen in time. There's something to be said about that.* # [Permacomputing](https://permacomputing.net/) [Permacomputing](https://permacomputing.net/getting_started/)