[ line 01 · the language ]
Rust, from First Line to Systems
18 of 30 labs liveStart with no Rust and finish writing the code the rest of the stack is built on.
[ open ]18 labs, graded, on this line todayStart free →
[ the catalog ]
Every course, on one board.
A path is a line. A course is a station. A lab is a tick. Solid track is built and graded today; dashed track is being laid, and says so.
4 lines6 courses open51 graded labs live1 course free, end to end
[ board ]free · Rust for Beginners4 lines · 51 graded labs live
[ line 02 · the machine ]
Operating Systems in Rust
33 of 55 labs liveBoot your own kernel, then teach it memory, scheduling, a filesystem, and a shell that answers you.
[ open ]33 labs, graded, on this line todayStart this line →
[ line 03 · the metal ]
Operating Systems in C
6 of 24 labs liveThe same machine, in the language it was written in — boot your own kernel in C and own every byte you hand the hardware.
[ open ]6 labs, graded, on this line todayStart this line →
[ line 04 · the data ]
Storage & Databases
0 of 5 labs liveBuild the engine under the query — pages, B-trees, and a log that survives the crash you cause on purpose.
[ not open yet ]this line opens when its first labs are gradedFollow the build →
[ drawing board ]
on no line yet · no dates, no promises
course fully live still landing not open yet built and graded being laid
one tick = one graded lab. The setup lab each course opens with is not one of them — it sits outside every count on this page.
every completion on every course is an official run of your code — earned, not self-reported.