In the space of three contiguous paragraphs, that phrase is used three times.

"... the model marked the start of the personal computer industry."

"Apple-1 was the start of the personal computer industry."

"The Apple-1 was the first Apple product to be sold. It marked the start of the personal computer industry."

200 units were built, 80 or so remain around today, and they were released in 1976. The Commodore PET was being designed in 1976, and released in 1977 - before the Apple II. There was, of course, a flurry of other activity around this time.

Are these grandiose claims reasonable?