An update to the Globe and Mail Guide to Safer Computing . Hack-proof computers don’t exist. That’s an important truth to keep in mind as you browse this guide to building a more secure computer.

These turned out to include a user manual for the Z4 Zuse, as well as notes on flutter calculations. Other documents, dated October 27, 1953, detail what the Z4 was working on.

Researchers will be able to gain a deeper understanding of what’s considered the world’s oldest surviving computer after its long-lost user manual was unearthed.The Z4, which was built in 1945 ...