Date: 2002-09-12 Docket: 02-46 David Loukidelis, Information and Privacy Commissioner. | Link

"This is called "caching"; each computer stores and preserves images locally that may be wanted again. Using the readily accessible local copy prevents reloading the image from a remote (and slow) source. Unix and Windows operating systems routinely cache images, as do individual web browsers. In particular, Netscape Navigator and Microsoft Internet Explorer make use of caches in RAM memory and on hard disk. These images are stored with particular names and time/date stamps, and they can be retrieved, copied and printed. The user will not necessarily be aware that these images are being stored, but it happens nonetheless." (para 12) As noted in the SCC decision, though, cache copies are not retained unless the users explicitly store them so they are available "off-line".