jbeverly:
So, I suppose I've written a serial.
Yes. Although the words seem to be used interchangeably, they are very different conceptually. A
serial is an integral narrative broken into parts. And to be somewhat picky, each part advances a significant part of the overall story line. Parts of a serial could be standalone stories, but usually they are not. There is a timing factor too. To be a true serial, parts are released at different times--daily, once a week, once every two weeks---whatever. Stephen King's "The Green Mile" was a serial. "Flash Gordon and the Menace from Mongo" is a serial.
A
series is a collection of stand alone stories having common characters, common settings, and a common theme. "Cheers" was a series. Seegee's "Spank Shop" is a series.
When you decide to create a series, you can publish as you write it, episode by episode without worrying about how to tie up all the plot threads at the end. There really is no end until the author wants there to be one.
If you set out to write a serial, it is a bit more complicated. Some folks charge off into the unknown figuring they'll figure it all out by the end. I'm too chicken for such a laugh-in-the-face-of-danger approach. I have to have the end in mind before I start. In fact sometimes I start with what I want to be the last line of the story and work towards that. (In fact I do that with short stories too).
So, yeah, when you write a long story, break it up into parts and release it piece by piece, it's a serial.