안녕하세요. 선생님

강의 11번에 해당되는 문제 중 module 2 24번 지문 해석 관련 질문이 있습니다.

The first computerized spreadsheet, Dan Bricklin’s VisiCalc, improved financial record keeping not only by providing users with an easy means of adjusting data in spreadsheets but also by automatically updating all calculations that were dependent on these adjustments. Prior to VisiCalc’s release, changing a paper spreadsheet often required redoing the entire sheet by hand, a process that could take days.

첫번째 문장에서 these adjustments가 의미하는 것이 무엇인가요?