Presidio Lovers Lane

El Polín Spring is a natural spring in San Francisco, California located in the Presidio. It is the source of the central tributary of El Polín Creek (also called Tennessee Hollow Creek). The spring was used by the Ohlone people, the Spanish military, and the U.S. Army as a freshwater source. Much of the stream was channelized or placed in underground culverts, and many riparian areas were used for landfill.

Let's Encrypt is a non-profit certificate authority run by Internet Security Research Group (ISRG) that provides X.509 certificates for Transport Layer Security (TLS) encryption at no charge. It is the world's largest certificate authority, used by more than 300 million websites, with the goal of all websites being secure and using HTTPS.

The Letterman Digital Arts Center (LDAC), is an institution located in the Presidio, San Francisco, that has served as the combined home of Industrial Light & Magic, LucasArts, and Lucasfilm's marketing, online, and licensing units since 2005.

The Letterman Army Hospital, established around 1898 and redesignated as the Letterman Army Medical Center (LAMC) in 1969, was a US Army facility at the Presidio of San Francisco in San Francisco, California, US. It was decommissioned in 1994. Some of the original 1898 buildings still exist and now house the Thoreau Center for Sustainability.

READ (Rural Education and Development) Global is a non-profit organization operating in rural South Asia and headquartered in San Francisco, California. Founded on the belief that improved access to educational resources creates lasting social change in developing communities, READ partners with rural villages to build Community Library and Resource Centers (READ Centers).

Yoda Fountain is a fountain with a bronze statue of the Star Wars character Yoda, installed at the Lucasfilm offices in the Letterman Digital Arts Center in San Francisco, California, United States.