Abstract: A task appropriateness determination apparatus includes a first learning unit causing artificial intelligence (AI) to learn image information of an index indicating a target object in a task appropriately completed state, an appropriate image provider providing an image possibly including the target object in the appropriately completed state and the index, a second learning unit causing the AI to detect an image where the index is present from the provided image after learning of the index, and learn image information of the target object in the image where the index is present, an image capturing unit capturing an image of a region including the target object and the index at least after the task, and a task appropriateness determiner determining that the task has been appropriately performed in response to detection by the AI of the target object roughly identical to the learned target object in the appropriately completed state.

Abstract: An information providing device capable of providing information through Web pages so that a user (a browsing party of the Web page) can acquire a desired piece of information without performing intricate operations. The information providing devices has such architecture that if a certain link anchor is manipulated (clicked) on the computer of the user who desires to acquire the information, the user can be provided with the information by displaying the standard content page that is to be redisplayed when there is met the predetermined condition about the elapse time since a point of time when the anchor manipulation has been done.

Abstract: An authentication apparatus decides whether a sender of an e-mail received is an authentic user. The authentication apparatus includes a confirmation mail transmission unit that transmits a confirmation e-mail to the sender demanding the sender to reply to the confirmation e-mail; and an authentication deciding unit that decides whether the sender is an authentic user depending on whether the sender replies to the confirmation mail.