After Hours

Lego Turing Machine: The building blocks of computing in play

A rotating beam with two orange arms mounted above the Lego tape can flip the black switches in both directions - either inscribing a symbol on the tape or erasing it.

Photo: Centrum Wiskunde & Informatica

By Nick Heath

Nick Heath is chief reporter for TechRepublic. He writes about the technology that IT decision makers need to know about, and the latest happenings in the European tech scene.