98-tan and 98SE-tan

Many variations exist; however, the most common is a pair of young girls. The First Edition of 98 has a white and blue uniform, a navy blue hair with a clip shaped like 98, and has a windows logo as part of a necktie. The 98 Second Edition mascot normally has grey-blue hair and a green sailor school uniform with the letters SE on the front.

Two early versions that continue to be used alongside the girls are a pair of stick-limbed snack-boxes with a face and version number drawn in crayon, based on the Vulcan 300 toy that appeared in the anime series Konjiki no Gash Bell!!. In the very early days before the designs of the primary OS-tans had settled, generic stick-limbed boxes were often used as placeholders; there had been instances of small DOS and Windows 3.11 boxes before other designs gained popularity. Both girls now make regular use of these as mechanical suits. The mech-box used by 98 is blue in colour, and likewise the 98SE mech-box has a green theme. The mechs are sometimes shown as guardians or friends to the 98-tans, otherwise the two girls can be seated inside them as pilots. The box sizes can vary, ranging from doll-like when carried by the girls to taller than an adult when they ride inside them. While both are fairly shy girls, 98SE is seen hiding in her mech-box a lot more often.