BeagleBone is an open-source single-board computer known for strong real-time I/O — many GPIO pins and onboard programmable real-time units (PRUs).1
Overview
The PRUs are small, deterministic processors alongside the main ARM CPU, which lets a BeagleBone handle precise, timing-critical signalling that a general-purpose Linux board struggles with. Combined with its generous pin count, this makes it a favourite for industrial control and electronics-heavy projects. It runs Linux like other SBCs.
Where it fits
The BeagleBone is the SBC alternative to the Raspberry Pi when I/O and determinism matter more than raw cost or community size. For general-purpose use a Pi is simpler; for GPU work at the edge see the NVIDIA Jetson.
Sources
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BeagleBone — Wikipedia, on the BeagleBoard family and its real-time I/O. ↩