vi Personal Content Experience: Managing Digital Life in the Mobile Age 2.6.1 Broadcast Networks ............................................. 35 2.6.2 Short-Range Wireless ........................................... 36 2.7 Case Study: Mobile Music .................................. 38 2.8 References ........................................................... 43 Chapter 3: Mobile Personal Content Uncovered ........... 45 3.1 First there were Files........................................... 48 3.1.1 From File Management to Content Management ........................................................ 49 3.1.2 Creation and Usage make Content Personal ........ 52 3.2 Categorization ..................................................... 54 3.3 Characteristics of Personal Content ................... 56 3.3.1 Content Explosion ................................................ 58 3.3.2 Personal Content is Invaluable ............................. 59 3.3.3 Personal Content is Familiar . . . or Not ................ 59 3.3.4 Favourites ............................................................ 61 3.3.5 Sharing and Communities .................................... 61 3.3.6 Relations and Associations ................................... 61 3.3.7 Privacy and Security Requirements ...................... 62 3.4 Mobile Personal Content .................................... 63 3.4.1 Mobile Personal Content is Distributed ................ 63 3.4.2 Mobile Content is Tied to Creation and Usage Context ..................................................... 64 3.4.3 The Same Content Types, New Usage Patterns ... 64 3.4.4 Totally New Content Types, or Extended Use of Existing Content Types ..................................... 65 3.4.5 New Behavioural Patterns .................................... 66 3.4.6 New Challenges ................................................... 67 3.5 Content Wants to be Free? ................................. 67 3.6 GEMS, a Tool for Modelling Personal Content Experience ............................................. 72 3.7 References ........................................................... 76