Business card first attested 1840; business letter from 1766. Business end the practical or effective part (of something) is American English, by 1874. Phrase business as usual attested from 1865. To mean business be intent on serious action is from 1856. To mind (one's) own business is from 1620s. Johnson's dictionary also has busiless At leisure; without business; unemployed.
Civil engineering is the design and construction of public works, such as dams, bridges and other large infrastructure projects. It is one of the oldest branches of engineering, dating back to when people first started living in permanent settlements and began shaping their environments to suit their needs.
What Civil Engineers Do. Civil engineers conceive, design, build, supervise, operate, construct, and maintain infrastructure projects and systems in the public and private sector, including roads, buildings, airports, tunnels, dams, bridges, and systems for water supply and sewage treatment. Work Environment