Do you know any electronic assistive systems for elderly people?

My Dead is about 66 right now. Physically he is relatively fit for his age. But mentally, his problems with memory and orientation are still growing because of Morbus Alzheimer. He even can not remember names, numbers or where are the things he had in his hands before some hours. There are some electronic assistive systems, equal where in the world, you could advise me? Please, give me also a link to the mentioned product.