Latches are available as integrated circuits, usually with multiple latches per chip. Some intercom systems incorporate control of devices such as signal lights and door latches. Latches and flip-flops are used as data storage elements. Flip-flops and latches are used as data storage elements. It is common to use this logic family for multiplexers and latches. The Butterfly PUF is based on cross-coupling of two latches or flip-flops. Before vehicle separation in lunar orbit, manual cocking of the twelve ring latches was accomplished. This circuit consists of two stages implemented by NAND latches. The tingler latches onto a woman's leg, and she screams until it releases its grip. Project Ara used latches and electropermanent magnets to achieve this. For example, the first 500 Series 1 cars had flat floors and external bonnet latches. All are opened by the use of quick-release latches which activate an alarm. This produces a facehugger, which latches onto and impregnates its prey with an embryo. When Linksy examines more closely, one of the parasites latches onto his cheek. P is a vulnerable, lonely, emotionally damaged young girl who quickly latches herself onto Joe.