BOBJ, stands for Business Objects
its the leading BI (business intelligence) company which has been acquired by SAP lately
you can find more about Business Objects here
BusinessObjects is correct one.
If you want to know what is BOBJ then one simple ANSWER is BOBJ is a reporting / Analysis tool which comproses several other tools within it.
Just name few:
WebI = Web Intelligence for Adhoc reporting
Crystal Reports = CR for formatted reporing
Xcelsius = For Dash Board reporting....
There are some other BOBJ Product too.
Few hot one...
BOBJ Data Services (It is new version which includes Data Integrator and Quality)
BOBJ Data Integrator
BOBJ Data Quality
BOBJ Data Federator.
BOBJ Advanced Analysis