1Bianca Schroeder, Disk failures in the real world: What does an MTTF of 1, 000, 000 hours mean to you?, FAST ' 07: 5th USENIX Conference on File and Storage Technologies.
2ISO 19005-1 Document management-Electronic document file format for long-term preservation Part 1: Use of PDF 1.4 (PDF/A).
3ISO 12653 -1 & 2 : 2000-Electronic imaging- Test target for the black-and-white scanning of office doc- uments - Part 1: Characteristics.
4ISO 29861: 2009-Document management applica- tions-Quality control for scanning office documents in color.