How a Car Works
howacarworks.com
How a Car Works offers free illustrated guides explaining how different car systems work, from engines and brakes to suspension and transmissions. Ideal for car owners, enthusiasts, and those learning basic automotive mechanics, with an optional in-depth video course.
Making Software
makingsoftware.com
Making Software is an illustrated online reference manual by Dan Hollick that explains how everyday digital technologies work — from screens and color spaces to fonts, vectors, AI, and more. A visual deep dive for designers, developers, and the curious. Many chapters are available to read.