Microsoft MultiMedia Encyclopedia (Windows 1.x)
Did you know that Windows 1.0 had multimedia capabilities? Some raw footage taken for a broadcasting company in April 1987 includes a glimpse into what would've eventually become Microsoft Encarta. It's also one of the earliest technical demonstrations of the CD-ROM (contextually speaking, a conventional audio CD being used for storing data). To put things into perspective, this predates the PC Engine CD-ROM² by one year.