— Smartphones and tablet computers can put information at your fingertips. But if you’re a beginning user, your device might have lots of untapped potential. Learn how to use your device or, if you’re an experienced user, learn more about its features and capabilities. Expert volunteers will lead free two-hour, customized, hands-on AARP TEK (Technology, Education and Knowledge) workshops in April and May. Bring your own device or borrow one there. Participants will receive a free stylus pen and guidebook. There …