Editing Cryptonomicon (section)

===Other technology===
* [[Arc lamp#Carbon arc lamp|Carbon arc lamp]]
* [[History of the battery#Dun cell|The Dun improved galvanic element]]<ref>{{cite book |author=United States. Patent Office |title=Specifications and Drawings of Patents Relating to Electricity Issued by the U. S. |url=https://books.google.com/books?id=FIFRAAAAYAAJ&pg=PT80 |year=1886 |pages=80–81 |quote=In the new element there can be used advantageously as exciting-liquid in the first case such solutions as have in a concentrated condition great depolarizing-power, which effect the whole depolarization chemically without necessitating the mechanical expedient of increased carbon surface. It is preferred to use iron as the positive electrode, and as exciting-liquid nitro muriatic acid, (''aqua regis'',) the mixture consisting of muriatic and nitric acids. The nitro-muriatic acid, as explained above, serves for filling both cells. For the carbon-cells it is used strong or very slightly diluted, but for the other cells very diluted, (about one-twentieth, or at the most one-tenth.) The element containing in one cell carbon and concentrated nitro-muriatic acid and in the other cell iron and dilute nitro-muriatic acid remains constant for at least twenty hours when employed for electric incandescent lighting.}}</ref>
* [[Delay-line memory#Mercury delay lines|Mercury acoustic delay-line computer memory]]