![Screenshot of simson.net: The Unix-Haters Handbook (1994) [pdf]](https://hn.urlbox.com/shots/renders/2025/8/25/f8417c21-2f2c-4fed-9bc0-780557ba819f.jpg)
![Screenshot of cdn.akamai.steamstatic.com: Valve Software handbook for new employees [pdf] (2012)](https://hn.urlbox.com/shots/renders/2025/8/24/e5e16876-63ee-49bf-a8cc-91a6f8fefeba.jpg)
First screen, captured .
Looks similar
![Screenshot of cses.fi: Competitive Programmer's Handbook (2018) [pdf]](https://hn.urlbox.com/shots/renders/2026/10/5/69c71102-f7bf-42e0-9682-6868f4f24f49.jpg)
Competitive Programmer's Handbook (2018) [pdf](cses.fi)
302 points by vinhnx | 79 comments
PDF of the Competitive Programmer's Handbook by Antti Laaksonen (July 2018 draft), a free book on algorithms for programming contests.
Launching RDAP; sunsetting WHOIS(icann.org)
844 points by radeeyate | 331 comments
ICANN announcement about launching the Registration Data Access Protocol (RDAP) and sunsetting the WHOIS service for domain registration data.
