Black widow is an interesting super hero that is capable of many things like...
Black Widow wants to help people as much as she can, especially the US soldiers that go to war. Since she is an expert in weapons and devices, she decided for her business to be about making and selling weapons of choice. She also likes helping students at school with there work but she focuses on keeping the country safe.She is going to name her business the widows weapons.
https://www.thewrap.com/when-does-the-black-widow-movie-take-place-marvel-cinematic-universe/
https://time.com/3847432/marvel-ceo-leaked-email/