I was pretty proud of my solution, but when I presented it to the engineering manager, he was like 'WTF?' and implemented a simple QWERTY grid. Place your estimates for next 6 months and see what others are thinking about it. Since different-sized keys can't be arranged into a grid very well, I figured I might as well put the most-used keys together, and put the most common letter combinations ('bigrams,' like TH and ER) next to each other. No copyright and free background music for youtube videos. Camera Float Luxebell Universal Foam Floating Wrist Strap for GoPro Hero 8 7 6 5 Nikon Olympus Canon Keys. Then I thought, 'why should all the keys be the same size, when we use E waaaay more often than Z, for example?' So I looked up letter frequencies and found that in English, we use just 9 keys about 80% of the time. The Epic Hero music by Keys of Moon promoted by Royal Infotron Music. I'd recently finished my Biomechanics/Ergonomics master's thesis measuring muscle activity on physical keyboards, and after double-checking the anthropometric charts for touch size standards, I realized the screen was too small to make all keys the recommended size. It was 2001 (remember pre-smartphone life? Bring your map!), and I was designing a small touchscreen keypad for an in-vechicle messaging system.

Hero keys test