Apple Without A Bite, the
This symbol first turns up in HW with the arrival of the Callahan family's new Apple IIIc+ computer.1 The Apple logo in question is the early striped version, noticeably without the "bite". To Dairine, at first much more interested in the computer itself than any weirdness in its logo, this difference is initially of no interest. But when she clones the computer and takes off with its portable version on her Ordeal, she slowly begins to catch on to what the apple's biteless status implies.
The next mention of the symbol comes in TWD, when Dairine upgrades the Callahans' household computer. The original machine machine arrived with the software version of the Wizard's Manual installed. Because of this, Dairine has become involved with the Manual software's beta group, and the newly upgraded computer on which she's testing the Manual beta is plainly a tweaked version of the Power Macintosh G4 Cube. Its logo is the modern, non-striped variety, and biteless like its predecessor. (Dairine's "beta version" wallpaper, minus the computerized Manual's lovely rippling-curtain desktop animation, is here, at 1024x768 resolution.)
.jpg){kind=link}
The latest variation on this theme occurs in WAW, when one young wizard turns up at the crisis meeting on the Moon carrying a WizPod that features a "glass" version of the biteless logo. (An ad for this interesting piece of hardware, detailing some of its more attractive features, can be found here.)
In the YW universe, the Biteless Apple has become something of a symbol of the wizardly implementations of modern technology, and therefore seemed like a perfect choice for the logo of ErrantryWiki. Whether the symbol's usage in the books also implies some covert admiration of the intrinsic coolness of the products of the company associated with the Biteful Apple in what passes for the Real World, the Powers That Be have so far declined to say. (HW, TWD, et seq.)
1 This computer is, of course, fictional, and loosely based on the
Apple IIc/IIc+.