A lesson in control systems from the online social lab

Because social media only have tools of approval, these set up positive feedback loops, which amplify the bad.

Q&A: Not a sudoer

How can I use the sudo command from a non-admin user account?

Folder actions can do many useful things. Here I develop one to decompress Zip archives.

LittleBits packages electronics into neat modules, bringing insight into how and why devices work.

In case there is anyone left still using Flash, Adobe has just released version 18.0.0.232, which fixes the […]

Seurat painted five series of paintings carefully constructed to help form 3D space.

Sometimes connecting to hotel WiFi results in failure, because the Mac has a self-assigned IP address. Why?

How can I best use the two Ethernet ports on my Mac Pro?

The UK government doesn’t want to ban encryption, but may see it as a cheap way of winning votes from the easily-impressed.

Although I have disabled Time Machine, my Mac still runs periodic Time Machine backups.