SAP BO Course Info : http://goo.gl/KdmRdo

sap business objects is purely a reporting tool. These reports are helpful in order to analyze the business. it could be a day to day business or historical business. business objects is helpful to analyze the organizational data with the better representations .by using these reporting tools we can evaluate business.
business objects is very strong in the reporting analytics where it can represent the organizational data with various sets of reports. business objects is a front end application which means end users always looking into reports. but for these front end applications we will be have a various sets of backend applications.bo developers prepares the reports and data is prepared by backend persons by using different applications like etl testing. so for any business objects platform there could be definitely a backend applications as well.
business objects having various reporting formats. these formats are web intelligence reports, crystal reports, dashboards ,QAAWS queries, polestar report, explorer and widgets. business objects giving specific solutions to the industries by using these reporting tools. industries means insurance, banking and different sectors.etl tools are working as a backend applications. the tools are like bods, datastage, ssis and informatica. purpose of these tools are extract the data from different sources and load the data into warehouse. warehouse is nothing but a historical data storage where you can preserve your organizational data.
data warehousing is a collection of different databases. database is used to store the various types of organizational data. to create reports for different types of databases a middle layer is used these layer is called as universe. universe is a middle layer between database and report. for example to create hr reports hr universe is used. business objects can also supports various backend applications like sap hana, sap bwbi and flatfiles.