SAP R/3 SAP R/3 is the former name of the main enterprise resource planning software produced by SAP AG. It is an enterprise-wide information system designed to coordinate all the resources, information, and activities needed to complete business processes such as order fulfillment or billing.
SAP based the architecture of R/3 on a three-tier client/server model.
1. Presentation Server
2. Application Server
3. Database Server
The presentation server is actually a program named sapgui.exe. It is usually installed on a user's workstation. To start it, the user double-clicks on an icon on the desktop or chooses a menu path. When started, the presentation server displays the R/3 menus within a window. This window is commonly known as the SAPGUI, or the user interface (or simply, the interface). The interface accepts input from the user in the form of keystrokes, mouse-clicks, and function keys, and sends these requests to the application server to be processed. The application server sends the results back to the SAPGUI which then formats the output for display to the user.
An application server is a set of executables that collectively interpret the ABAP/4 programs and manage the input and output for them. When an application server is started, these executables all start at the same time. When an application server is stopped, they all shut down together. The number of processes that start up when you bring up the application server is defined in a single configuration file called the application server profile. Each application server has a profile that specifies its characteristics when it starts up and while it is running. For example, an application sever profile specifies:
• Number of processes and their types
• Amount of memory each process may use
• Length of time a user is inactive before being automatically logged off.
The application server exists to interpret ABAP/4 programs, and they only run there-the programs do not run on the presentation server. An ABAP/4 program can start an executable on the presentation server, but an ABAP/4 program cannot execute there. If your ABAP/4 program requests information from the database, the application server will format the request and send it to the database server.cvb.
SAP stands for System Applications and Products. It is the name of both the online financial and administrative software and the company that developed it. SAP is made up of individual modules that perform various organizational system tasks.8 of the top 10 largest US corporations use SAP software and also 8 of the top 10 highest profit US companies use SAP software.
Not only in united states over the world there are more than 7500 customers in over 90 countries have chosen SAP and therefore a leading global provider of client/server business software solutions. Also 34% of SAP's customers worldwide are under $200 million. All these above statistics clearly shows that there is a great demand for SAP and the job opportunities for SAP are on the higher side.
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