Period
Electricity reached ordinary homes, and electronics took shape around the vacuum tube. Radio, the telephone network, sound recording, and early television grew into mass media, while engines and machines were refined for a public that increasingly expected them to be dependable and widely available.
Placed by when the older technology emerged. Many of these stayed in wide use long afterward.
Computing
Vacuum Tubes compared with Transistors
Early radios, telephone repeaters and the first electronic computers ran on glowing glass tubes; nearly everything electronic today runs on transistors. This article explains…
Communication
Rotary Phones compared with Smartphones
A rotary phone asks for one finger, one hole, and a patient wait for the dial to spring back. A smartphone asks for almost…
Audio and Entertainment
Broadcast Radio compared with Podcasts
Radio sends one live signal to everyone within range; a podcast sends a file to whoever asks for it. Both fill commutes and kitchens…
Audio and Entertainment
CRT Televisions compared with Flat-Panel Displays
A CRT television builds its picture by steering an electron beam across the inside of a deep glass tube. A flat panel lights a…
Transportation
Toll Booths compared with Electronic Toll Collection
Paying to use a road once meant stopping, and now often means not noticing. This article traces tolling from early turnpikes and manual plazas…
Audio and Entertainment
Vinyl Records compared with Music Streaming
A grooved plastic disc and a catalog delivered over the internet both answer the same wish: hearing recorded music on demand. This comparison follows…
