快3|福彩网网址

                            Comments in the following email refer to version 3.0 of Power, D. "A Brief History of Spreadsheets"

                            Date: Thu, 15 Apr 1999 19:19:56 -0400 
                            From: Mitchell Kapor        
                            To: Daniel Power   
                            Subject: Re: spreadsheets  
                            
                            Thanks for sharing your paper.
                            
                            A few comments: 
                               
                            I am not familiar with Mattessich's work.  Thanks for pointing it out.
                            I've always felt what gave Visicalc its unique power and novelty was the
                            way it married a user interface to the data model.  I find it plausible
                            that a data model consisting of a matrix of cells with formulas in them was
                            not new to Visicalc.  However, the use of a direct interaction metaphor,
                            which was enabled by the personal computer, was certainly new.  The
                            marriage of the two created the killer app.    
                                
                            Corrections: 
                                    
                            Visicalc also used the "A1" referencing method.  It was Microsoft Multiplan
                            which used the inferior R1C1 notation.                      
                            
                            I worked at Personal Software in 1980, not 1981.
                            
                            I didn't exactly offer to sell Personal Software the rights to 1-2-3.
                            After getting royalties on VisiPlot/VisiTrend, I approached them to buy me
                            out of my contract.  As a condition of sale, PSI wanted a non-compete.
                            That is, they wanted me to agree, for a period of time, not to create any
                            products which had a competitive overlap with the ones I was selling them
                            the rights to.  Since the plan for the new product (not yet named 1-2-3)   
                            had graphing integrated with the spreadsheet, I faced a problem how to
                            proceed.  What I did was disclose the spec for the product to them and ask
                            for an exemption from the non-competition agreement for that product.  I am
                            not sure why they agreed to this.  Perhaps they felt I lacked credibility
                            to pull off something this ambitious.  If so, they underestimated me.
                            
                            
                            At 12:59 PM 4/12/99 -0500, you wrote:
                            >Hello-  
                            >
                            >I was reviewing your bio on the web and thought perhaps you'd review my
                            >paper "A Brief History of Spreadsheets" at URL dss.cba.uni.edu.  Any   
                            >comments, reflections, corrections, suggestions would be much        
                            >appreciated. 
                            >        
                            >Daniel Power
                            
                            

                                                      news

                                                      culture

                                                      aviation

                                                      Buddhism

                                                      Finance

                                                      mailbox

                                                      Celebrity

                                                      car

                                                      Real estate