Sony pioneered the use of transistors in consumer electronics. Its portable radios and portable televisions disrupted firms such as RCA that made large TVs and radios using vacuum tube technology. During the 1960s and 1970s, Sony launched a series of new-market disruptions, with products such as videotape players, handheld consumer video recorders, cassette tape players, the Walkman, and the 3.5-inch floppy disk drive.
