The form on the kitchen table

Eighteen weeks before any of that, the chip was in a box in a warehouse, and Case was at a kitchen table with a phone, a cooling cup of tea, and a decision already made.

The Harborview Marathon has a page on the web, and Case had read it four times by then. The route. The cutoff times. The year the bridge was closed for repairs and everybody ran the waterfront twice instead, which the page mentions in one dry sentence that runners still argue about. It is a websiteConcept · lights on your mapwebsiteAn application you reach through a web browser, which mostly exists to tell you things. A news site, a restaurant page, somebody’s blog. Nothing is installed on your machine. The browser fetches it fresh each time you look, which is why a change the race director makes at noon is on your screen by one.. You go there to be told things.

The entry form is somewhere else. It lives in the Traversal app that Case installed from a store back in March, and that is a mobile appConcept · lights on your mapmobile appAn application installed on a phone or tablet, usually from an app store. The phone versions of Spotify, Uber, Instagram. It sits on the machine instead of being fetched, which is why it can still open with the screen dim and the signal gone, though most of what it shows needs a connection to stay current.. It stays on the phone, signal or no signal.

Three states away, Molly would eventually find a different door into the same product. On race morning she watched from a tab on her laptop, phone face-up beside it, dragging a map of Harborview around with two fingers and squinting at a moving dot she had decided was her kid. That tab held a web appConcept · lights on your mapweb appAn application that also runs inside a browser, but behaves like a tool you use instead of a page you read. Google Docs, Figma, Gmail. The line between this and a website is a spectrum, not a wall. — it looked like a page and behaved like an instrument.

And at the finish line, on a folding table under a tent, the timing crew runs a program installed on a laptop. It keeps working when the tent wifi does not, which on race day is most of the morning. That is a desktop appConcept · lights on your mapdesktop appAn application installed on a laptop or desktop machine. Microsoft Word, Photoshop, the desktop version of Spotify. Like a mobile app it lives on the machine, not in a browser tab., and the crew would be lost without it.

Four doors, one product

A website you read, a mobile app in a pocket, a web app in a browser tab, a desktop app under a tent. Four different doors, four different machines, and behind all of them the same race.

Every one of those four is an applicationConcept · lights on your mapapplicationSoftware built to help somebody accomplish a particular task or purpose. Spotify, Excel, Google Maps. It is the useful kind of software, as distinct from the quieter kind that keeps the machine being a machine.. The word covers all four shapes. When an engineer says “the app” in a meeting, the useful question is always which of the four they mean, and it is a fair question to ask out loud.

Case thought about none of this. Case typed a name, a date of birth, an estimated finish time that was optimistic by eleven minutes, and tapped the button at the bottom of the form.