Perspectives
作者：Åke Nygren
1. Service
1.1. Immaterial
1.1.1. Content
1.1.1.1. Multi-platforms
1.1.2. Labour skills
1.1.2.1. Personal service
1.1.2.1.1. Social relations
2. Institution
2.1. Material
2.1.1. Format
1.1.1. Content
1.1.1.1. Multi-platforms
1.1.2. Labour skills
1.1.2.1. Personal service
1.1.2.1.1. Social relations
2.1.1. Format