https://californiamissionguide.com/
California Mission Background and History - California Mission Guide
Apr 12, 2026 - From 1769 to 1823, Spanish soldiers and monks built a total of 21 Missions and 5 Presidios (or military forts), stretching North from Mexico through California.
background and historycaliforniamissionguide
https://www.nist.gov/pml/owm/about-owm/owm-background-and-history
OWM Background and History | NIST
The Office of Weights and Measures (OWM) is the oldest office at NIST and holds a unique position, with its functions predating NBS and t
background and historynist