THE WEB STANDARDS GROUP RECOMMENDS that Web pages be designed to work with the browsers that approximately 90% of our visitors use. Current usage is based on www.ucsb.edu domain stats. As of February, 2009, approximately 90% of our visitors were using these browsers and platforms:
|
| DATA (pdf) |
INFORMATION (pdf)
(Updated yearly for February) |
|
| 2010 |
|
|
| 2009 |
|
| Because browser usage evolves over time, this page will be updated periodically. Please note that the usage statistics for your Web site may vary from the statistics cited here.
|
Note that the above statistics are based on server log analysis of the http header variable "user-agent" which is a reasonable (but not completely accurate) measure of the browser and platform combination of the visitor. Although a target of 90% of 1,500,000 page views excludes 150,000 views, nearly 2000 apparently unique user agents only account for 1% of page views. |
It is also possible that an immeasurable portion of the diminished hits may belong to the ninety-percentile group because the log files have errors or incomplete records. The log analysis application Webalizer produced these statistics and attempts to determine the user-agent even if the log record is incomplete. When the number of page views per user-agent is plotted, the graph has a long "tail," thousands of user-agents accounting for less than one percent of the total number of views. |
The following graph (roughly to scale), attempts to illustrate this concept, a long tail of presumably unique user agents but with diminished numbers of actual page views. |
Feb2009-concept-graph (pdf) |
For BrowserCam and other validation tools, see our Site Tools page at http://www.ucsb.edu/webguide/resources/tools.shtml. |
The standards described on this page may be used for vendor requirements; e.g., "Product must work with approximately 90% of our current usage."
|
|
