This document discusses several theories related to technology adoption and use: 1) Uses and Gratification Theory which explains that individuals use media like social media to fulfill cognitive, affective, personal integrative, social integrative, and tension-free needs. Social media is highly gratifying for users. 2) Moore's Innovation Adoption Rate Theory which states that adoption of new technologies happens gradually as innovators, early adopters, early majority, late majority, and laggards accept the technology. Personal computers followed this pattern. 3) Media System Dependency Theory which suggests that increased media use leads to dependency, and cell phone dependency will continue rising through 2025 as phones fulfill more needs.