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Let's Encrypt

Certificate authoritiesInternet properties established in 2014Linux Foundation projectsMozillaPages with non-numeric formatnum arguments
Secure communicationTransport Layer SecurityUse mdy dates from April 2016

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 265 million websites, with the goal of all websites being secure and using HTTPS. The Internet Security Research Group (ISRG), the provider of the service, is a public benefit organization. Major sponsors include the Electronic Frontier Foundation (EFF), the Mozilla Foundation, OVH, Cisco Systems, Facebook, Google Chrome, Internet Society, AWS, NGINX, and Bill and Melinda Gates Foundation. Other partners include the certificate authority IdenTrust, the University of Michigan (U-M), and the Linux Foundation.

Excerpt from the Wikipedia article Let's Encrypt (License: CC BY-SA 3.0, Authors).

Let's Encrypt
Letterman Drive, San Francisco

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N 37.800322 ° E -122.449951 °
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Letterman Drive 1
94129 San Francisco
California, United States
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Presidio Fire Department
Presidio Fire Department

Established in 1917, the Presidio Fire Department provides primary emergency response to the Presidio of San Francisco. During the 1940s, '50s and '60s the Presidio's Firehouse served as the headquarters station to a much larger department consisting of many Stations located at the various forts around San Francisco such as: Fort Baker, Fort Barry, Fort Funston, Fort Mason, Fort Winfield-Scott, Fort Cronkhite, Chrisy Field, and Angel Island along with fire prevention duties and air show fire protection at Hamilton Air Force Base after its closure and prior to its transfer to the City of Novato. Although most of the firehouses have long since been demolished, some still stand such as those located at the Presidio of San Francisco's Main Post, Fort Cronkhite, Fort Mason and Angel Island. The National Park Service maintains the daily log books dating back to the 1940s from several of the department's stations in the Park Archives of the Golden Gate National Recreation Area and they are available to the public for viewing. Over the years the Presidio Fire Department was reduced and left with two fire stations. Fire Station 1 was located in the Presidio of San Francisco's Main Post and Fire Station 2 was located in the Marin Headlands at Fort Cronkhite. In 1994, as a result of the Presidio of San Francisco's closure under the Base Realignment and Closure act the Presidio Fire Department and staff was transferred from the Department of the Army to the National Park Service and became the only full-time fire department within the National Park Service under the Golden Gate National Recreation Area, Division of Visitor Protection. However, as indicated by report #RECD-00-154 issued by the Government Accountability Office in 2000; the National Park Service as a whole was unable to effectively operate its various fire protection programs throughout the country. The GGNRA was no exception to this, and after years of struggling attempting to operate the Presidio Fire Department, the GGNRA began exploring options to rid themselves of the management burden of running a full-time fire Department.