PowerBook 100

After the Portable's failure, Apple split its laptop bet three ways. The PowerBook 140 and 170 were designed in-house; the entry-level 100 was something stranger — Apple handed the Portable's architecture to Sony, whose engineers were masters of miniaturization, and asked them to shrink it. Sony delivered a machine one third the Portable's weight.

All three PowerBooks launched together in October 1991, and all three shared the design decision that actually changed the industry, credited to Apple's industrial design group: moving the keyboard toward the hinge to create palm rests, with a trackball dead center. Before the PowerBook, laptop keyboards sat at the front edge and pointing devices clipped awkwardly to the side. After it, every manufacturer on earth adopted the layout within roughly two years.

The 100 was the runt at launch — old 68000 processor, no internal floppy — and it sold slowly at $2,300. Then Apple cut the price, and it became a phenomenon; at $999 closeout it was reportedly the fastest-selling Mac to date. The PowerBook line as a whole did a billion dollars of revenue in its first year, an astonishing rescue arc two years after the Portable fiasco.

The 100 also introduced SCSI Disk Mode: cable it to a desktop Mac and the whole laptop mounts as an external hard disk. It would take the rest of the industry a very long time to match that trick.

The palm-rest-and-centered-pointer layout is one of the most copied industrial designs of the twentieth century — so universal that it has become invisible. When design historians list Apple's most influential objects, the 1991 PowerBooks sit near the top, above far more famous machines.

For Apple, the PowerBook line proved the company could still define a category post-Jobs, and its billion-dollar first year carried the company's early-nineties finances. Mobile Macs never left the lineup's heart again.

The 100 is small in a way that still reads as modern — closed, it's a neat grey slab that disappears into a shoulder bag, and the wedge profile makes the keyboard angle genuinely comfortable. The trackball takes ten minutes of relearning and then becomes oddly delightful; your thumbs do the clicking on the two crescent buttons.

The passive-matrix screen is the period piece: the pointer 'submarines' if you move it fast, and fast scrolling smears. But for writing — which is what these machines mostly did — it's a focused, quiet, distraction-free tool. Modern writers who collect vintage laptops consistently name the early PowerBooks as favorites, and the 100 is the purest of them.