Due to stock issues, the company keeps limited units for the sale and a lot of buyers are left disappointed. (techradar.com)
We also limited the unit of analysis (1 - 2 minute video clips) and the foci of observation (classroom management and student questioning). (citejournal.org)
We believe that Kindle sales are ramping up this year due to: (1) the elimination of major supply constraints that limited unit sales for the first 15 months after launch; (2) a large increase in content available on the Kindle Store; and (3) the Kindle2 and Kindle DX product launches. (dealsagar.com)