4 AC. Relationship of LIS with other fields 3 A. Theoretical and general aspects of libraries and information 2 IC. Index languages 2 processes and schemes 1 B. Information use and sociology of information 1 BG. Information dissemination and diffusion more ... 1 BI. User interfaces 1 BZ. None of these 1 HZ. None of these 1 but in this section 1 usability less ...