Microsoft Excel has the basic features of all spreadsheets,using a grid of cells arranged in numbered rows and letter-named columns to organize data manipulations like arithmetic operations. It has a battery of supplied functions to answer statistical, engineering and financial needs. In addition, it can display data as line graphs, histograms and charts, and with a very limited three-dimensional graphical display. It allows sectioning of data to view its dependencies on various factors for different perspectives (using pivot tables and the scenario manager).It has a programming aspect, Visual Basic for Applications, allowing the user to employ a wide variety of numerical methods, for example, for solving differential equations of mathematical physics,and then reporting the results back to the spreadsheet. It also has a variety of interactive features allowing user interfaces that can completely hide the spreadsheet from the user, so the spreadsheet presents itself as a so-called application, or decision support system (DSS), via a custom-designed user interface, for example, a stock analyzer,or in general, as a design tool that asks the user questions and provides answers and reports.In a more elaborate realization, an Excel application can automatically poll external databases and measuring instruments using an update schedule,analyze the results, make a Word report or PowerPoint slide show, and e-mail these presentations on a regular basis to a list of participants. All Excel Keyboard Shortcuts
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Many historians have credited the Gavilan as the first fully functional laptop computer. The First True Laptop Computer. Laptop Computer History 1975 The first portable computer was the IBM 5100, released in September 1975. It weighed 55-pounds, which was much lighter and more portable than any other computer to date. While not truly a laptop by today's standards, it paved the way for the development of truly portable computers, i.e., laptops. 1976 Alan Kay came up with the idea of the laptop computer in 1976 while working at Xerox PARC (Palo Alto Research Center), calling it the Dynabook. He helped develop a prototype of his Dynabook, which was officially named the Xerox Note Taker. 1979 Bill Moggridge designed the GRiD Compass in 1979, the most portable computer at the time and the closest example of a laptop computer. NASA used the GRiD Compass in their space shuttle program in the early 1980s. 1981 Developed by Adam Osborne in April 1981, the Osborne I ...
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