A drive-in theater allows customers to view movies from their cars. In 1933, Richard Hollingshead invented the drive-in by experimenting with car parking arrangements to create good views. He opened the first drive-in on June 6, 1933. The largest drive-in theater is in Dearborn, Michigan with parking for 3,000 cars. There are currently about 325 drive-ins operating in 25 states, largely in the Eastern and Midwestern U.S. The first drive-in used an FM radio frequency for sound. Customers tune their car radios to a specific frequency to hear the movie audio.
In 1956, IBM developed the first commercial hard drive called RAMAC with a capacity of 5 million characters. It leased for $3,200 per month, equivalent to $160,000. The drive was large, resembling a washing machine. In 1988, smaller 2.5” drives were introduced by companies like Seagate and Western Digital. Today 2.5” drives reach capacities of 16TB.
Long cattle drives were used to transport herds of cattle over long distances. The longest on record drove 15,000 cattle from Texas to California in 1869. Cowboys doing the driving were paid between $25-$30 per month. Though challenging, long drives continued into the 20th century.