This industry-wide situation of inconsistent formatting has concerned many photographers who worry that their valuable raw photos may someday become inaccessible, as computer operating systems and software programs become obsolete and abandoned raw formats are dropped from new software. The availability of high-quality open source software which decodes raw image formats, particularly dcraw, has helped to alleviate these concerns. An essay by Michael Reichmann and Juergen Specht stated "here are two solutions – the adoption by the camera industry of A: Public documentation of RAW "formats; past, present and future, or, more likely B: Adoption of a universal RAW "[sic" format". "Planning for Library of Congress Collections" identifies raw-file formats as "less desirable file formats", and identifies DNG as a suggested alternative.