From scheduled radio to a personal queue

The name joined two ideas, but the format’s key change was how listeners got audio. Traditional radio sent programs on a schedule; early podcasts let people collect episodes and hear them when they chose. A new episode could arrive on a computer, then be transferred to a portable music player for listening away from a desk.

The simple machinery behind a subscription

Many shows used an RSS feed—a small, regularly updated file that tells software when a new episode is available and where to find its audio. A podcast program could check that feed and download the file, sparing listeners from visiting each show’s website to look for updates. The iPod made the final step familiar: sync the downloaded episode and take it along.

That chain—publisher, feed, download, portable player—made independent audio easier to distribute without a radio station’s broadcast schedule or a listener’s constant internet connection. The word’s reference to the iPod captures that early listening habit, even as the format later spread to devices that could play episodes directly.