One of the earliest computer keyboards was invented in the 1960s as computers transitioned from specialized machines to more general-purpose devices. These keyboards were fairly basic, with large mechanical keys laid out in alphabetical order to facilitate typing. As computers advanced in capabilities in the 1970s, keyboards also evolved to accommo...

Enter tex The earliest microscopes were very simple instruments, using just a single lens to magnify small objects. Starting in the early 1600s with innovations like Antonie van Leeuwenhoek's simple single-lens microscope, scientists were able to view cells and microorganisms for the first time. Over centuries, compound microscopes with multiple le...