This is from a TIME article.
Instead, Vitalik gravitated to the clarity of numbers. At 4, he inherited his parents’ old IBM computer and started playing around with Excel spreadsheets. At 7, he could recite more than a hundred digits of pi, and would shout out math equations to pass the time. By 12, he was coding inside Microsoft Office Suite.
From what I saw on the Internet, The Microsoft Office Suite is a set of programs for common productivity tasks, including a word processing program, a spreadsheet tool, presentation software, an email program and others.
Then, does the part in bold in the above context mean Vitalik used programming languages to create or improve some parts of Microsoft Office Suite?