Editing Cathode-ray tube (section)

===Nimo===
{{Main|Nimo tube}}
[[File:Nimo tube BA0000-P31 showing digit 9.jpg|thumb|right|Nimo tube BA0000-P31]]
Nimo was the trademark of a family of small specialised CRTs manufactured by [[Industrial Electronic Engineers]]. These had 10 electron guns which produced electron beams in the form of digits in a manner similar to that of the charactron. The tubes were either simple single-digit displays or more complex 4- or 6- digit displays produced by means of a suitable magnetic deflection system. Having little of the complexities of a standard CRT, the tube required a relatively simple driving circuit, and as the image was projected on the glass face, it provided a much wider viewing angle than competitive types (e.g., [[nixie tube]]s).<ref>{{cite web |url=http://www.tube-tester.com/sites/nixie/dat_arch/BA0000-P31.pdf |archive-url=https://web.archive.org/web/20071025051757/http://www.tube-tester.com/sites/nixie/dat_arch/BA0000-P31.pdf |archive-date=2007-10-25 |url-status=live |title=IEE Nimo CRT 10-gun readout tube datasheet  |work=tube-tester.com|access-date=1 December 2009}}</ref> However, their requirement for several voltages and their high voltage made them uncommon.