When I was a part of my newspaper class in high school, I came across my high school yearbook from 1978. I remember being fascinated by it and took images of the black and white photos. At the time, the only colorized photos were the senior portraits and nothing else, so using the neural filter tool in photoshop, I colorized the other images. It was really easy to use, and I will definitely use it in the future as well.
Images: