Deep-dive into PipeDream, a unified word processor/spreadsheet/database app on RISC OS, running on the ARM chip that now powers modern smartphones.
Key Takeaways
ARM was designed by a small Acorn team in 1983 with no prior CPU experience; it now underlies Apple Silicon and most smartphones.
RISC OS shipped as a stop-gap (originally called Arthur) after the planned ARX OS missed launch; it features context menus via a dedicated middle mouse button and no menu bars.
RISC OS pioneered a taskbar-style icon tray, drag-to-save file workflow, and scalable anti-aliased fonts before NeXT or Windows 95.
PipeDream (by Mark Colton) dissolved the word processor/spreadsheet/database boundary into one document model, a design still uncommon in modern productivity suites.
The author found RISC OS deeply disorienting despite decades of computing experience, citing the three-button mouse semantics, no path autocompletion in save dialogs, and a non-obvious double/single-click launch sequence.
