SPREADSHEETS

What is a spreadsheet?a computer application that simulates a paper

accounting worksheet displays multiple cells usually in a two-

dimensional matrix or grid consisting of rows and columns

frequently used for financial information because of their ability to re-calculate the entire sheet automatically after a change to a single cell is made

Paper spreadsheets "spreadsheet" came from "spread" in its sense of a

newspaper or magazine item (text and/or graphics) that covers two facing pages, extending across the center fold and treating the two pages as one large one

The compound word "spread-sheet" came to mean the format used to present book-keeping ledgers —with columns for categories of expenditures across the top, invoices listed down the left margin, and the amount of each payment in the cell where its row and column intersect

Early implementations

Batch spreadsheet report generator LANPAR spreadsheet compiler Autoplan/Autotab spreadsheet

programming language APLDOT modeling language VisiCalc Lotus 1-2-3 and other MS-DOS

spreadsheets

Batch Spreadsheet Report Generator

dealt primarily with the addition or subtraction of entire columns or rows (of input variables) - rather than individual 'cells‘

One implementation is the Business Computer Language (BCL) which was used in IBM 1130 in 1962

In the late 60's Xerox used BCL to develop a more sophisticated version for their timesharing system

LANPAR spreadsheet compiler Stands for LANguage for Programming Arrays at

Random was conceived and entirely developed in the

summer of 1969 following Pardo and Landau's recent graduation from Harvard University

was used by Bell Canada, AT&T and the 18 operating telcos nationwide for their local and national budgeting operations

was implemented on GE400 and Honeywell 6000 online timesharing systems enabling users to program remotely via computer terminals and modems

Autoplan/Autotab spreadsheet programming language

Developed by A. Leroy Ellison, Harry N. Cantrell, and Russell E. Edwards - founder of Capex Corporation

"AutoPlan" ran on GE’s Time-sharing service; afterward, a version that ran on IBM mainframes was introduced under the name "AutoTab“

was not a WYSIWYG interactive spreadsheet program, it was a simple scripting language for spreadsheets

APLDOT modeling language

An example of an early "industrial weight" spreadsheet

developed in 1976 at the United States Railway Association on an IBM 360/91

as used successfully for many years in developing such applications as financial and costing models for the US Congress and for Conrail

was dubbed a "spreadsheet" because financial analysts and strategic planners used it to solve the same problems they addressed with paper spreadsheet pads

VisiCalc implemented by  Dan Bricklin and Bob Frankston

on Apple II in 1979 the first spreadsheet that combined all essential

features of modern spreadsheet applications, such as WYSIWYG interactive user interface, automatic recalculation, status and formula lines, range copying with relative and absolute references, formula building by selecting referenced cells

the first "killer app", an application that was so compelling, people would buy a particular computer just to use it

Lotus 1-2-3 and other MS-DOS spreadsheets

Loturs 1-2-3: released in January 1983 and replaced Visicalc

Microsoft Excel: starting in the mid 1990s continuing through the present, Microsoft Excel has dominated the commercial electronic spreadsheet market

OpenOffice.org Calc: a free, open-source program modelled after Microsoft Excel

Gnumeric is a free cross-platform spreadsheet program that is part of the GNOME Free Software Desktop Project

Web-based spreadsheets

Ajax circa 2005 Office Web AppsGoogle Spreadsheets

The above online spreadsheets have strong multi-user collaboration features and / or offer real time updates from remote sources such as stock prices and currency exchange rates