my two questions are based on abbreviations in the reading that i didn't understand, and therefore, i had trouble understanding the text around it.
1) what does OS stand for, and how does it relate to the interface? it is mentioned twice, and in both areas i am confused by the context around it.
2) what does AI and AL stand for? the text around these abbrevations talks about the evolution paradigm which also confuses me, and i don't know how all of these terms relate.
