Before there was anything that could remotely be called a laptop or notebook, there were the "luggables," heavy, non-IBM compatible machines that ran some version of the operating system,CP/M, that came before MS and PC-DOS.
At top in the image at left is the Xerox NoteTaker. This prototype machine of 1976 was never manufactured, but it was the first of the luggable computers and it set the standard for the early portables that would follow.
The NoteTaker may have also been the first computer product to use a name made of two words smushed together, which is now rampant in the field of personal computers, programs, and accessories.
The machine in the middle is the aluminum-cased, 27-lb Kaypro II circa 1982. This was the first portable "personal" computer I ever saw and touched, and it was portable once - it moved into the small office and there it remained, open and ready, until its retirement some years later.
The lower machine is an Osbourne 1, a 22.5-lb microcomputer with a 5-inch screen. Notably, it used a version of Smalltalk as its operating system. It was also the first microcomputer that could run business applications, among these WordStar, SuperCalc, and, a little later, the dBase database programming manager and language.