Greyed out letters mean no term beginning with that letter exists. The request of an advertising element as a direct or indirect result of a visitor's action, as recorded by the advertisement server software. Pushed advertisements may be included as ad downloads. The request of an advertising element as a direct result of a visitor's action, as recorded by the advertisement server software. The common ad format encountered on web-sites.
Browsers can be either text or graphic.
They read HTML coded pages that reside on a server and interpret the coding into what we see as Web pages. Netscape Navigator and Microsoft Internet Explorer are examples of Web browsers. The storage of recently used documents on a user's disk to speed browsing. When a user revisits a page, their browser might display the document from the local disk, rather than from a site's Web server. As a result, Web servers may undercount the number of times a page or advertisement has been viewed.