Dame Stephanie Shirley, Freelance Programmers
At 83 Dame Stephanie Shirley has been making waves in tech for decades.
Freelance Programmers, founded in 1962, has over 8,500 employees and specialises in tailor-made commercial software and business management.
She is no longer involved in the company but her work as an entrepreneur, philanthropist and speaker is extensive.
For the full #FemaleFounders101 list, head here.