Editing BTC 5100 (section)

==Variants==
;Capacitive
:Uses tactile [[BTC foam and foil]] switches; FCC ID is E5X5R5BTC-5100<ref name="alps.tw-5100" />
;5100C
:This is the best-known version, with conductive [[BTC dome with slider|domes]] over a PCB. It is perhaps known better as the [[SIIG MiniTouch Plus]]. Found in both beige (AKA ivory) and black.<ref name="IBT-5100C" /> FCC ID is E5X5R5BTC-5100C. There are slight differences between the AT version and the PS/2 version: the AT has looser, well-lubed sliders and a snappier/louder key press. It also may use ever so slightly snappier domes but the difference is very minimal.    In comparison the PS/2 version has tight scratchy sliders and a muted sound, possibly due to a thicker top housing. 
;Membrane rubber dome
:Same sliders as the earlier revisions, but with standard (pressure) membranes{{citation needed}}
;Flytech
:[[Flytech Carry I keyboard]] is a rebadged 5100 with a revised shell that was registered separately with the FCC by Flytech
;Big-ass Enter version
:In September 2021 a BTC 5100 with a layout identical to some Flytech Carry I models appeared on eBay. It featured a big-ass Enter key, an inverted-T arrow cluster, shorter Control and Alt keys and a larger backspace key. The Home, End, Page Up and Page Down keys formed an extra column on the right of the keyboard, rather than being accessed via Function + Arrows as in the more common model. The top of the keyboard was blank, having neither the pencil tray common to regular 5100s, nor the grooves found on Flytech Carry Is.