It looks like your calculator is running KnightOS, a custom operating system for TI z80 calculators. If you no longer want to use it, you can reinstall TI-OS. I suggest looking at the KnightOS website for further instructions: https://knightos.org/. Source: about 1 year ago

The creator also made https://knightos.org, written in z80 asm. Source: about 2 years ago

Well, whilst it can't quite play Skyrim, because the TI is built around a z80, you can have a full operating system is you'd like. Source: over 2 years ago

There are a very few calculators that you can do this to. See https://knightos.org. Source: over 2 years ago

There is Knight os which might be what you're looking for. It does have lackluster support for math functions but is great for homebrew games. They have detailed install instructions and allow you to revert back to the official os if needed. https://knightos.org/. Source: almost 3 years ago

Nvidia is obviously an exception. That’s like saying working at startups will lead to higher monetary rewards because “look at early Facebook employees”, whereas your expected pay after 4 years at a startup is almost always lower than if you just worked at a medium to large company that’s public. (See https://levels.fyi). - Source: Hacker News / 13 days ago

Many developers are surprised to learn that levels.fyi, known for its tech salary data, initially ran on spreadsheets without a backend database. This example shows the potential of spreadsheets in managing web data and how you can start with something that works to optimize it later. We can do the same thing with Google Drive and Google Sheets in C#! - Source: dev.to / 4 months ago

Check levels.fyi , SoundCloud Level4, Level5 are barely reaching 100K with YOE 8-10 years. N26 - L4(Senior), L5(Lead) have avg TC around 80-85 and 100-105 respectively. Zalando for the interview process they have - Senior is around 90K and principal around 115K. That's kinda low. Source: 6 months ago

PS: I have started looking at levels.fyi and Glassdoor - only LinkedIn for job postings for now. Source: 6 months ago

Salary wise, you can check on https://levels.fyi/, but from what I remember the range is 60-65K for Paris office. Source: 6 months ago