1 files changed, 11 insertions, 0 deletions
diff --git a/docs/prototypes/panel-widget-gallery.html b/docs/prototypes/panel-widget-gallery.html
index 007b4cd..455b0ff 100644
--- a/docs/prototypes/panel-widget-gallery.html
+++ b/docs/prototypes/panel-widget-gallery.html
@@ -684,6 +684,14 @@ const INFO={
   origin:'PDP-11/70 and IMSAI front panels.',difficulty:'Intuitive to watch, expert to read.',
   prefer:'A spinner says busy; blinkenlights say HOW busy and with what rhythm.',
   period:'1965-80 minicomputer era; the icon of computing at work.'},
+'R57':{input:'Click keys to type; DEL takes back one character, CLR wipes the lot, ENT commits. Click-only, so it ports to Emacs unchanged.',
+  solves:'Free alphanumeric text on a panel that has no keyboard — the one job the rest of the kit cannot do.',
+  use:'Specialty. Shines where a panel must accept a string it could not know in advance: a passphrase, an SSID, a callsign, a label.',
+  limits:'Slow by design — a 20-character passphrase is 20 clicks. Any real keyboard beats it for volume; this is for panels that have none.',
+  origin:'Fleet, kiosk and access-control keypads — a membrane plate for the colour-coded function keys, a stainless one for the letters-left layout and the backspace.',
+  difficulty:'Intuitive to use, tedious past a few words.',
+  prefer:'Text is genuinely unbounded. R16 is the digits-only sibling and is faster where the alphabet is not needed.',
+  ref:'../../working/retro-stereo-widgets/references/2026-07-16-abc-keypad-membrane-color.png'},
 'R56':{input:'Drag the left half for temperature, the right for humidity. Drag-only, two surfaces.',
   solves:'A categorical verdict from two values — the crossing point falls into a printed judgment.',
   use:'Common on weather stations and comfort meters. Shines when the pair only matters as a combined condition: comfort, safe-operating region, duty envelope.',
@@ -1341,6 +1349,9 @@ card(C,'R50','Two-hand safety control',
 card(C,'R51','Voice-loop keyset',
   (st,rd)=>GW.voiceLoop(st,{onChange:(v,t)=>rd(t)}),
   '<b>attention management, not selection.</b> Each loop is independent: click to monitor (green bar, flickering with activity), again to talk (amber, exclusive — one voice out), again to drop. Flight controllers ran a dozen of these at once. After a mission-control comm keyset.');
+card(C,'R57','ABC entry keypad',
+  (st,rd)=>GW.abcKeypad(st,{onChange:(v,t)=>rd(t)}),
+  '<b>letters on a faceplate.</b> A-Z laid out alphabetically, not QWERTY — the industrial convention wherever the operator is not assumed to touch-type. Type into the window; DEL takes back one character, CLR wipes the lot, ENT commits. R16 enters digits; this is its alphanumeric sibling, and the only card in the kit that takes free text. After fleet and kiosk keypads: the membrane plate\'s colour-coded CLR / ENT, the stainless plate\'s letters-left arrangement and its backspace. Its CANCEL is dropped — that plate is a whole terminal with a transaction to abandon, where this is one control in a panel that owns its own dismiss.');
 
 /* ============ METERS & GAUGES ============ */
 const M=$('meters');