What was the weight of the first portable computer released in 1981, measured in kilograms?

The weight of the first portable computer, which was the Osborne 1 released in 1981, was indeed 10.7 kilograms. This computer was significant for being one of the first to be marketed as portable, although it was still quite heavy by today’s standards. The incorporation of a complete package including software, two floppy disk drives, and a built-in screen made it revolutionary at the time. Its weight reflected the technology available then, as it included relatively bulky hardware components. Understanding the context of early portable computing helps to appreciate advancements in technology that have led to modern lightweight laptops and tablets.