Observed arrival · 2026-09-28
Systems Learning makes bits something you can touch
An interactive learning lab for computer systems, starting with binary and bitwise logic and drawing on CS:APP and Hacker’s Delight.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Learners studying binary, C, and computer systems
- Worth noticing
- The lab flags that its fixed-width values wrap modulo 2^w, while C integer promotions and signed-overflow rules are separate concepts.
Field notes
The visible lab represents an 8-bit word, shows two inputs and a bitwise result, and gives the result in hexadecimal and decimal. Its note distinguishes modulo-2^w wrapping in the displayed model from C integer promotions and signed-overflow rules. The page describes generated exercises and spaced review, while C-expression and x86-64 labs are presented as next chapters.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
One card from the complete issue