Quattro Pro

QuattroQuattro Pro for WindowsBorland QuattroQuattroproWQ1
Quattro Pro is a spreadsheet program developed by Borland and now sold by Corel, most often as part of Corel's WordPerfect Office suite.wikipedia
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Borland

Borland InternationalBorland Software CorporationSegue Software
Quattro Pro is a spreadsheet program developed by Borland and now sold by Corel, most often as part of Corel's WordPerfect Office suite.
Adam Bosworth initiated and headed up the Quattro project until moving to Microsoft later in 1990 to take over the project which eventually became Access.

Spreadsheet

spreadsheetscellspreadsheet program
Quattro Pro is a spreadsheet program developed by Borland and now sold by Corel, most often as part of Corel's WordPerfect Office suite.
Lotus 1-2-3, along with its competitor Borland Quattro, soon displaced VisiCalc.

Tab (interface)

tabbed browsingtabstab
While it is commonly said to have been the first program to use tabbed sheets, Boeing Calc actually utilized tabbed sheets earlier.
In 1992 Borland's Quattro Pro popularized tabs for spreadsheets; Microsoft Word in 1993 used them to simplify submenus.

Lotus 1-2-3

Lotus 1231-2-3Lotus 1-2-3 Release 2.2
Historically, Quattro Pro used keyboard commands close to Lotus 1-2-3.
However, when it sued Borland over its Quattro Pro spreadsheet in Lotus v. Borland, a 6-year battle that ended at the Supreme Court in 1996, the final ruling appeared to support narrowing the applicability of copyright law to software; this is because the lower court's decision that it was not a copyright violation to merely have a compatible command menu or language was upheld, but only via stalemate.

Novell

Novell, Inc.Novell Inc.PGSoft
Borland sold the spreadsheet to Novell six months before the final decision was handed down.
Under the leadership of founder Ray Noorda, during the early- to mid-1990s Novell attempted to compete directly with Microsoft by acquiring Digital Research, Unix System Laboratories, WordPerfect, and the Quattro Pro division of Borland.

Lotus Dev. Corp. v. Borland Int'l, Inc.

Lotus v. BorlandLotus Development Corp. v. Borland International, Inc.Borland versus Lotus case
Quattro Pro was the subject of a major lawsuit by Lotus against Borland.
Borland released a spreadsheet product, Quattro Pro, that had a compatibility mode in which its menu imitated that of Lotus 1-2-3, a competing product.

Boeing Calc

While it is commonly said to have been the first program to use tabbed sheets, Boeing Calc actually utilized tabbed sheets earlier.
This concept was a precursor of the tabbed sheets included in Quattro Pro and later spreadsheets.

Adam Bosworth

Adam
Quattro was written in assembly language and Turbo C principally by Adam Bosworth, Lajos Frank, and Chuck Batterman.
Prior to Microsoft, Bosworth worked for Borland where he developed the Quattro spreadsheet application following Borland's acquisition of Analytica in 1985 - founded by Bosworth and Eric Michelman, and managed by Brad Silverberg.

Paradox (database)

ParadoxBorland ParadoxParadox Database
Both the QPW and Paradox for Windows codebases (the latter being another Borland database application) were based on Borland's internal pilot project with object oriented UI code for Windows.
Both Paradox for Windows and Quattro Pro for Windows, a closely related project, started development using beta versions of Windows 3.0, in the spring of 1990.

WordPerfect

WordPerfect OfficeWordPerfect CorporationCorel WordPerfect Office
Quattro Pro is a spreadsheet program developed by Borland and now sold by Corel, most often as part of Corel's WordPerfect Office suite.
The offerings were marketed as Borland Office, containing Windows versions of WordPerfect, Quattro Pro, Borland Paradox, and a LAN-based groupware package called WordPerfect Office.

Seymour I. Rubinstein

More history of Surpass (pre-Quattro Pro code base)Seymour Rubinstein
Programs developed partially or entirely under his direction include WordStar, HelpDesk, Quattro Pro, and WebSleuth, among others.

Brio Technology

Brio Query
Borland purchased DataPivot from Brio Technology to add a new feature to the program.
The DataPivot code was later sold in the early 1990s to Borland and integrated into Quattro Pro.

Corel

Corel CorporationCorel CorpCorel Corpororation
Quattro Pro is a spreadsheet program developed by Borland and now sold by Corel, most often as part of Corel's WordPerfect Office suite.

Lotus Software

LotusLotus Development CorporationLotus Development
When version 1.0 was in development, it was codenamed "Buddha" since it was meant to "assume the Lotus position", #1 in the market.
Incidentally, competitor Borland code-named their Quattro Pro software "Buddha", as the software was meant to "assume the Lotus position" and take over Lotus 1-2-3's market.

Italian language

ItalianItalian-languageit
When the product was launched in 1988, its original name, suggested to Mr. Kahn by Senior VP, Spencer Leyton at a Vietnamese restaurant in Santa Cruz, was Quattro (the Italian word for "four", a play on being one step ahead of "1-2-3").

Tetris

Tetris ClassicTetris GoldTetris Mania
That led to Mr. Kahn setting an appointment with an agent for some Eastern European software developers, Robert Stein of Andromeda Software, which was also involved with the game Tetris.

Assembly language

assemblerassemblyassembly code
Quattro was written in assembly language and Turbo C principally by Adam Bosworth, Lajos Frank, and Chuck Batterman.

Borland Turbo C

Turbo CCPure C
Quattro was written in assembly language and Turbo C principally by Adam Bosworth, Lajos Frank, and Chuck Batterman.

Modula-2

Modula 2ModulaModula-2 programming language
Borland acquired a replacement product called "Surpass", written in Modula-2.

1989 Loma Prieta earthquake

Loma Prieta earthquakeearthquake1989 San Francisco earthquake
The Borland main office was near the epicenter of the Loma Prieta earthquake and the building was severely damaged when large and heavy air conditioners on the roof of Borland's main building were thrown upward by the quake, and came crashing down upon the glulam beams running across the top of the building.

Glued laminated timber

glulamGlue Laminated Timbergluelam
The Borland main office was near the epicenter of the Loma Prieta earthquake and the building was severely damaged when large and heavy air conditioners on the roof of Borland's main building were thrown upward by the quake, and came crashing down upon the glulam beams running across the top of the building.

Quality assurance

QAquality assessmentquality
Quattro Pro finished final quality assurance testing and was sent to manufacturing from those computers running on the tennis courts in the (fortunately) sunny and dry autumn weather.

Macro (computer science)

macromacrosmacro language
Borland supplied the 1-2-3 menus as an alternative because keystroke compatibility was needed in order to run macros in 1-2-3 worksheets.

John Paul Stevens

Justice StevensStevensJohn P. Stevens
The case went all the way to the U.S. Supreme Court which split 4 to 4 (Justice Stevens recused himself).