Adobe Acrobat and Portable Document Format technology. Readers: 6100 (0.1%) {25%} Mesgs per month/day: 335/11 {40%} Crossposting: 12% {45%} Megs per month/day: 0.4/0.013 {37%} Sites reciving this Group: 52% Cost ratio ($US/month/rdr): 0.03