This document discusses how libraries can provide mobile services to patrons. It defines key terms related to mobile technology like smartphones and the mobile web. It provides statistics on mobile phone and internet use that demonstrate the opportunity for libraries. It then describes different approaches libraries can take to create a mobile web experience, including apps, mobile-optimized websites, and screenshots of existing library interfaces. It also lists examples of specific mobile activities libraries can offer like accessing email, books, audiobooks, and more through a phone.