GeoWorks was a GUI-based operating system developed by Berkeley Softworks, initially as GEOS for the Commodore 64, and later for PCs. It was designed to be lightweight and functional on inexpensive hardware, and was popular in the early 1990s. The operating system was created by Berkeley Softworks, not to be confused with Berkeley Systems, which developed the 'flying toasters' screensaver. GeoWorks was eventually renamed from GEOS in the early 1990s and was bundled with some PCs, including a 386 computer that the author used as a kid.

Every Mac since macOS 13 (2022) has a pair of daemons that build a graph about the user and their relationships, using data from various apps and services, including Contacts, Calendar, Photos, Messages, Mail, location, and Screen Time. The graph is used by LLMs, but there is limited documentation on how the mechanism works. Apple researchers published a paper on the techniques behind the graph construction in 2023, but the integration into macOS and the exact data collection and inference methods are unclear.