As we've written before, companies manufacturing electronics designed to be used in prisons make them transparent, so that inmates cannot use them to smuggle contraband.

Previously we'd looked at some prison radios as well as transparent electric typewriters, but product pipelines evolve, and now there are full-blown laptops. Here's the Securebook, by Justice Tech Solutions:

"This Securebook can be used confidently in a living unit without fear of hacking or abuse by residents. The Securebook is transparent for quick visual inspection by security staff and lacks all connectivity ports for easy management by IT staff."

"By removing USB ports, Cameras, and Networking (ethernet and WiFi), the laptop itself has no ability to communicate with the outside world. This makes it secure in the hands of residents who are not monitored during their use of the device."

For those with privileges, the Securebook can be attached to separate docking stations that permit WiFi connectivity or attachment to a printer and other peripherals.

The Securebook runs $549.

Sadly, a question posed to the Securebook website reads "Hello, our school district wants to place an order."

If you're curious about the machine's innards (despite the fact that you can see most of them already), engineer Zephray Wenting tore down a Securebook and posted images here.