Dan Bricklin

Dan Bricklin is an American software engineer and entrepreneur who co-created VisiCalc, the first widely successful spreadsheet program.

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Bob Frankston: Bob Frankston is an American computer programmer who co-created VisiCalc with Dan Bricklin. Frankston implemented the software that turned Bricklin’s spreadsheet idea into a working product.
VisiCalc: VisiCalc was the first widely successful electronic spreadsheet program, released for the Apple II in 1979. Bricklin co-designed this program to let users change numbers and see dependent results recalculate.
Harvard Business School: Harvard Business School is a graduate business school at Harvard University. A classroom case study there inspired Bricklin to imagine a recalculating electronic ledger.
Personal computer revolution: The personal computer revolution was the spread of affordable computers into homes, schools, and workplaces. VisiCalc gave businesses a compelling reason to buy personal computers.
Daniel S. Bricklin: Daniel S. Bricklin is an American business executive and unrelated to software entrepreneur Dan Bricklin. The similar names can lead to confusion; this executive is a different person.
Electronic spreadsheet: An electronic spreadsheet organizes data in cells and applies formulas to calculate and update values. VisiCalc established the interactive spreadsheet form that later programs extended.
Interactive computing: Interactive computing lets people enter commands or data and receive responses while a program is running. VisiCalc applied this immediate feedback model to business calculations.
Spreadsheet: A spreadsheet is a grid-based system for organizing, calculating, and analyzing data. Bricklin’s work helped turn spreadsheets from accounting layouts into interactive software tools.
Jay S. Walker: Jay S. Walker is an American entrepreneur who co-founded Priceline and founded Walker Digital. Bricklin later worked with Walker on software ventures and product development.
Apple II: The Apple II is an early personal computer introduced by Apple in 1977. Its display and keyboard made it a practical platform for VisiCalc in offices.