Abstract: When sharing visible content on multiple display surfaces associated with different users, the hand of a user may be detected and analyzed when placed over the user's display surface. Characteristics of the user's hand, including things such as position, orientation, color, shape, and texture, may be shared with other users. Based on these characteristics, a representation of the user's hand may be depicted over the shared content on the display surfaces of the other users.

Abstract: Hand recognition is used to distinguish among users of gesture-based computer systems, and particularly between adults and children. Hands may be classified as adults or children based on certain physical characteristics, such as hand size, shape, or curvature. Depending upon whether the hand belongs to an adult or a child, user-appropriate interfaces are provided. For instance, in response to detecting a presence of a child, the interface may include more child-appropriate features such as simpler graphical elements, use of basic audio interfaces, and so forth.

Abstract: A light-weight, easy to use, commonly accessible, sign-up sheet that can be sent to volunteers and/or participants on email or social media vehicles. The sign-up sheet preferably has some or all of the following features. In some cases, the sign-up sheet auto-updates and keeps everyone informed. It preferably aids the organizer (and volunteers) in dealing with changes to the sign-up sheet. In one aspect, organizers can pre-assign volunteers to tasks. The sign-up sheet, preferably at all times, helps all parties involved to keep an accurate and current record of commitments to tasks, including commitments of time, items and payments, without the need to resort to multiple unnecessary broadcast emails. The platform preferably allows the organizer to send automated reminder emails to volunteers at the right time with the correct information.