Let's move on to the second sentence:
"lean" again, means anything that reduces waste in a company, or that simplifies and makes processes more effective.
"streamlined" means "something that was made simpler or more effective"
"controlling", in the corporate world, means "one of the functions of managers, that deals with setting standards, measuring performance and taking correcting actions depending on the results of the measurements"
"Supporting lean principles and using the streamlined integration towards all ERP capabilities in the controlling, financial, purchasing, inventory management and production execution area is unique for ERP offerings."
This sentence talks about ERP systems in general, it does not refer to the ABC software exclusively. It basically says that ERP systems have a few unique characteristics when compared to other types of software. Among these unique characteristics you can find that ERP systems support lean principles, which means they are designed to help managers reduce waste and optimize things. They are also able to integrate, in an effective, simpler way (streamlined), all the different areas of the company, like the information from the financial department, the purchasing department, the production department, information about inventory tracking and forecasting, and of course, the controlling function of managers.
I hope this helps you, and that it didn't create more confusion, ha ha ha.
Regarding who wrote this, I guess it may be an Indian company called abcinfosoft. There are a couple things that lead me to believe it wasn't written by a native English speaker, but in general, business and corporate descriptions of software and tools, tend to sound like that, even if written by native speakers.