In some Soviet digital calculators of the 1970s, such as the Elektronika 4-71b, 9-segment displays were used to provide basic alphanumerics and avoid confusions with representing numbers in Soviet postcodes.
The extra two bars were slanted forward, allowing for an appropriate-looking И, and to differentiate the numeral 3 from the letter З. The Sharp Compet calculator also uses a 9-segment display, allowing a small range of characters and symbols to be used.
Nine-segment displays are used in many Timex digital watches, and some pagers, such as the Nixxo XPage,1 the Arch BR502 pager,2 and the Scope Geo N8T.3 They are also used in some Epson Stylus printers, and Newport iSeries digital meters.4 The display used in the iSeries is unique in that it has a vertical extra segment at top, and a fully backwards-leaning slant for the extra segment at bottom. This allows for a somewhat more natural-appearing R and M.
A nine-segment display has been developed for displaying Bengali5 and Roman numerals.
"Primus" (PDF). Primus Ontario English. http://www.primustel.ca/en/residential/paging/en_xpage.pdf ↩
"Br502 Numeric Pager" (PDF). Archived from the original (PDF) on 2007-04-13. https://web.archive.org/web/20070413060226/http://content.arch.com/products/datasheets/DataSheetbr502.pdf ↩
"GEO N8T" (PDF). Archived from the original (PDF) on 2007-09-29. https://web.archive.org/web/20070929200255/http://www.sensorium.co.uk/datasheets/paging/geo_n8t.pdf ↩
⁄32 DIN Temperature, Process and Strain PID Controllers (PDF), archived from the original on October 25, 2005 https://web.archive.org/web/20051025171037/http://www.newportus.com/PDFspecs/i32.pdf ↩
Miah, Mohammad Badrul Alam; et al. (2015-01-01). "Designing More Effective 9 Segment Display for Bengali and English Digits". Engineering International. https://www.researchgate.net/publication/329778175 ↩