Products that inspired me

I’m going to pretend for a moment that I’m being interviewed.

Q: Which products have influenced your thinking the most?

A: The mechanical typewriter and the TI-83 calculator.

I was born in the 80’s and went to elementary school in the 90’s, so I grew up with word processors. As a kid I also played with programming languages such as BASIC and LOGO, advancing as I got older. Then, sometime in high school, I discovered a mechanical typewriter in a box in the basement. It was a revelation. I couldn’t believe how ingenious it was. Metal rods and gears were shaped exactly right to swing up to hit an ink strip and then shift the page horizontally for the next letter. Pressing the “shift” key literally shifted the entire typing mechanism so that a different part of the rod hit the ink strip. Incredibly, the shift key accomplished this without even being difficult to hold down.

By contrast, it was so rare to see truly ingenious software designs. Computers were so powerful that it didn’t matter much whether they were well designed. A poorly-made spreadsheet program on a PC was still far more useful that a spreadsheet on paper. In comparison to the typewriter, software seemed like a crutch. Programming made it easy to manipulate numbers and graphics any way you liked. When you don’t know how to write programs, software seems like magic; but I knew how to code, and I knew that you could kludge together impressive-looking apps without doing anything particularly clever.

I was humbled before this typewriter. It immediately set my gold standard for elegance.

I had a longer history with the TI-83. I received one in eighth grade and immediately started exploring its depths. By the end of the year, I knew the product inside and out. I was creating ASCII racing games using its built-in programming language. I gave these games to my friends and marveled at my ability to entertain them with a bunch of pixels blinking on and off.

The information architecture of a TI-83 is extraordinary. There is no pointing device — just buttons and a small black-and-white screen. The extensive feature set of the calculator is stored within a giant submenu system, accessed by pressing buttons in the right order. Today this kind of limitation on a user interface sounds like a recipe for disaster. But the TI-83 was so carefully engineered that the interface worked. The grouping of submenus made sense. Function-graphing capabilities were together; trigonometric operators were together; statistical routines were together; everything had its place.

There was still a learning curve — you didn’t pick up a TI-83 and immediately know how to graph y = sin(x). But this learning curve had been optimized. You only had to learn a few concepts to understand the organization of the entire device. There were some shortcuts and power-user features that I occasionally looked up in the user manual, but the answers were never surprising. They seemed obvious, in retrospect, and were easy to remember. The design was truly thoughtful and clever. It remained virtually unchanged over decades of use in math classrooms across the country.

Like the typewriter, the TI-83 set the bar high.

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