Motorola Handie Talkie HT-220 Slimline (1969)

 The first portable two-way radios introduced during World War II weighed up to 35 pounds apiece, but the HT-220 weighed just 22 ounces--in part because it was the first portable radio to use integrated circuits instead of discrete transistors. Back then it was a favorite of the Secret Service; today it enjoys a small but fiercely dedicated following of radio geeks.