the library is named libt9, I believe the author is aware of this...
Then why is a flip phone in the title? That was not specific to flip phones at all.
Because vastly more people will know what "flip phone typing" is over "T9 typing".
I figured other way around… Kids These Days might be more likely to have heard of a “flip phone” than “t9” and thus “engage” with this “content”
I had not heard of T9 before starting the project and getting interested, I'm too young to have experienced owning a pre-touch screen phone. I don't know if the average HN reader knows what T9 is, so I went with a term that I was fairly certain most people would be familiar with. Is that so people engage with my work? I certainly found the project fascinating, I made the library to share that fascination. If I can get more people to implement and use T9 and alike systems I think my work has has been a success.