As an IS professional, my boss has asked me to prepare a briefing for senior staff on the comparative advantages and disadvantages of three competing secondary storage technologies: magnetic hard disk drives, solid-state drives using single-level cell flash memory, and solid-state drives using multilevel cell flash memory. I have performed a search of the digital libraries and technology Web sites for source material to help me prepare for the briefing. Which sites have the most advertising? Which sites seem to contain biased information and what is the nature of the bias?