Lynn Korwatch located on top of Telegraph Hill. George F. Sweeney and Theodore F. Baugh were the two individuals to present the idea of a wooden semaphore on top of Telegraph Hill. A semaphore is a system in which one uses two flags or poles and sends signals in an alphabetic code. Sweeney and Baugh expanded their system by placing a signal station on Point Lobos, which is located 20–30 miles from port in San Francisco. The reasoning behind this was that there was high demand from people wanting to know when the ships were arriving at an earlier time so that
Messages (Apple) send audio and video messages by holding down the record button. In group conversations, users can remove/add someone to a thread, name a thread, share their location in a thread, view all attachments, and turn on Do Not Disturb to not receive notifications from a specific thread. As a part of the new continuity feature, users can now use their iPhones as a relay to send and receive SMS and MMS messages on their Macs and iPads. In iOS 9, the app received a redesigned overlay when sending an audio clip, as well as seeing contact photos in list view