part of the application software of a category that has become one of the most successful Spreadsheet . These are used for applications in many areas of economic, financial, scientific, engineering. As often happens in computing, they are called in different ways spreadsheets, spreadsheet, worksheet.
We can define the spreadsheet as the extension of a pocket calculator but with tools and commands great power and flexibility. When you start a spreadsheet is presented to us in front of a table characterized by rows and columns in which you can enter data and perform calculations. If I think of a spreadsheet I can think of a notebook with squares in each square you can enter a number, letter or part of a formula. The number of rows and columns is very high (65,536 rows and 256 columns), so you can create works of considerable size. Examples of
Spreadshhet: Microsoft Excel; Visicalc, Lotus 1-2-3. The
Database Management System (DBMS) is instead a software system designed to enable the efficient creation and manipulation of databases, usually by multiple users. And 'the control system of a data set. The DBMS play a key role in many computer applications ranging from accounting to human resources management and finance to technical contexts such as network management or telephony. In the past
DBMS were broadcast mainly in large companies and institutions, as these were the only ones who could afford the purchase of large hardware infrastructure necessary to build a database system efficiently, today their use has spread almost everywhere.
A DBMS is a set of very complex software programs that monitor: - the organization, storage and retrieval of data in a database;
- control the security and integrity of the database;
- accept requests for data by the application program and train the operating system to transfer the appropriate data.
Examples of DBMS: Oracle, Microsoft SQL Server, Access (always of the Office package). We
sottoilineare Another important distinction between the proprietary products and Opensource products. The term Proprietary Software going to show all the software that the restrictions imposed by the owner of the software for the note about the use, modification, reproduction or redistribution. These restrictions are obtained through legal or technical means.
* Technical means: it makes public only the binary code of the software but you do not provide the source code, which is considered a trade secret. Thus the modification of the software is very difficult and you can have if you have access to high computer skills.
* Legal means: licenses, copyrights and patents.
Examples of proprietary software: Microsoft Office, RealPlayer, WinZip.
Turning to Open Source (English word, open source) .. This term refers to a software whose authors or copyright holders, allow and encourage the study and free to modify it by third parties the software in question. But open source does not just mean access to the source code of a program because of a software license, must meet the following criteria:
- free distribution, without discrimination of any kind to persons / groups;
- provide the source code source;
- the rights attached to the program must apply to all to whom the program is redistributed;
- the license must not place restrictions on other software distributed with the licensed software ..
Examples of open source software: MySQL (database), Sun Microsystems, IBM.
are two distinct business approaches, one is not "better": the Open Source sells the service (the product is free and the business consulting company), the Product Owner sells the product (advice is free).
to talk through some numbers to reference the article on "fall" of the inscriptions at the University La Sapienza, place the following tables in respect of entries and registrations that are had the year 2007-2008 to the current year in the Faculty of Communication Sciences, in one of Statistics and the situation of Wisdom as a whole, taking into account all the universities:
We can define the spreadsheet as the extension of a pocket calculator but with tools and commands great power and flexibility. When you start a spreadsheet is presented to us in front of a table characterized by rows and columns in which you can enter data and perform calculations. If I think of a spreadsheet I can think of a notebook with squares in each square you can enter a number, letter or part of a formula. The number of rows and columns is very high (65,536 rows and 256 columns), so you can create works of considerable size. Examples of
Spreadshhet: Microsoft Excel; Visicalc, Lotus 1-2-3. The
Database Management System (DBMS) is instead a software system designed to enable the efficient creation and manipulation of databases, usually by multiple users. And 'the control system of a data set. The DBMS play a key role in many computer applications ranging from accounting to human resources management and finance to technical contexts such as network management or telephony. In the past
DBMS were broadcast mainly in large companies and institutions, as these were the only ones who could afford the purchase of large hardware infrastructure necessary to build a database system efficiently, today their use has spread almost everywhere.
A DBMS is a set of very complex software programs that monitor: - the organization, storage and retrieval of data in a database;
- control the security and integrity of the database;
- accept requests for data by the application program and train the operating system to transfer the appropriate data.
Examples of DBMS: Oracle, Microsoft SQL Server, Access (always of the Office package). We
sottoilineare Another important distinction between the proprietary products and Opensource products. The term Proprietary Software going to show all the software that the restrictions imposed by the owner of the software for the note about the use, modification, reproduction or redistribution. These restrictions are obtained through legal or technical means.
* Technical means: it makes public only the binary code of the software but you do not provide the source code, which is considered a trade secret. Thus the modification of the software is very difficult and you can have if you have access to high computer skills.
* Legal means: licenses, copyrights and patents.
Examples of proprietary software: Microsoft Office, RealPlayer, WinZip.
Turning to Open Source (English word, open source) .. This term refers to a software whose authors or copyright holders, allow and encourage the study and free to modify it by third parties the software in question. But open source does not just mean access to the source code of a program because of a software license, must meet the following criteria:
- free distribution, without discrimination of any kind to persons / groups;
- provide the source code source;
- the rights attached to the program must apply to all to whom the program is redistributed;
- the license must not place restrictions on other software distributed with the licensed software ..
Examples of open source software: MySQL (database), Sun Microsystems, IBM.
are two distinct business approaches, one is not "better": the Open Source sells the service (the product is free and the business consulting company), the Product Owner sells the product (advice is free).
to talk through some numbers to reference the article on "fall" of the inscriptions at the University La Sapienza, place the following tables in respect of entries and registrations that are had the year 2007-2008 to the current year in the Faculty of Communication Sciences, in one of Statistics and the situation of Wisdom as a whole, taking into account all the universities: