A summary of how home video game consoles evolved over time. This could include things such as their relationship with arcades and handheld consoles, notable companies, as well as how video game consoles became more powerful over time.
An overview of how personal music players/mp3 players came to be, changed and adopted various different designs and features, and ultimately died out over time. Could also include notable developments and important releases and companies.
A summary of the history of photography. Could include things such as the invention and evolution of the camera, as well as how photography evolved as an artform.