Terry Davis is a programmer that has had a very difficult life. After a series of manic episodes, at 44 Terry is now homeless and most believe he has schizophrenia or suffering some other seriously debilitating mental disorder. He was most recently spotted on the streets here in Portland.

What’s unusual about Terry is that he wrote his own operating system: TempleOS. It’s free to download, and is written in HolyC. He even has his own youtube channel. There is even video of him debugging it while living homeless in his car in the middle of parking lots.

His life currently demonstrates the terrible state of mental health care in the United States, and the difficult reality of many homeless. They are often very intelligent, but have disorders that make them non-functional in society.

Read more about TempleOS and Terry on wikipedia.

Warning: his more recent videos have racist and inappropriate sexual language.