i need my chapter 2 only, where in the review of related study, review of related literature, conceptual framework In rrl and rrs, i need 6 related operating system, 3 is for foreign, and 3 is for local here in the philippines. every operating system, it consists of 2 paragraph, the 1st paragraph was the description or features of the system, and the 2nd paragraph was the relationship and similarities of my system and their system. in each paragraph, 4 sentence is the maximum.