Original sentence: The IT related work in the developed countries has become vast and has been suffering from lack of IT workers and increase of cost.The worldwide trend is now moving from domestic outsourcing to overseas outsourcing.This "IT work" is not only software development which require engineering skills (ITO), but also other business work which does not require engineering skills  (BPO), such as call center and other information services.To get solution to their IT related problems, American and European companies have typically gone to Bangalore and other cities in India where English is used in higher education, while Japanese companies have depended on India for the non-Japanese language related IT work only
Edited sentence: (BPO), such as call center and other information services is a major aspect of DLSP's tenant's offshore business.Beginning in the 1980s, many IT companies in the developed world began to take interest in offshore labour markets.IT related work in the developed countries had been suffering from lack of IT workers and increased cost.The IT work is not only software development which require engineering skills (ITO), but also other business work which requires soft skills rather than engineering skills.The worldwide trend is now moving from domestic outsourcing to overseas outsourcing into countries that have a comparative advantage in labour intensive business activities