The Apostila Memorex Positivo was copyrighted by Positivo Informática S.A. and Memorex (then a division of Imation or Mitsubishi Chemical). However, as an orphaned work (not commercially available for over 15 years), the community generally accepts non-commercial sharing under for educational purposes.

Many Brazilian factories, banks, and government offices still run legacy hardware (Pentium III, 486, early Pentium 4) because they operate proprietary software or industrial machinery (CNC, PLCs) that cannot be updated. Technicians need old-school troubleshooting methodologies that modern books ignore—like how to configure IRQ conflicts manually or recover a FAT32 partition. This apostila covers that.