VCR Plus+

PlusCode is the museum's clearest example of printed language as a compressed machine command. The digits encode channel, half-hour start slot, duration (from a table of 48 possible start times), and day of the month; decoding uses a no-carry multiply against a fixed key plus table lookups. Ken Shirriff, Curt Welch, and Andrew Kinsman reverse-engineered the commercial algorithm and published it as "Decoding a VCR Controller Code" in Cryptologia 16(3), July 1992 — a consumer product's secret encoding treated as a code to be broken. The human-side interaction is the ritual: find the bold "+" number in the newspaper, punch the digits into the box, press Once/Daily/Weekly, and aim the box at the TV.

VCR programming was the era's most notorious interface failure — "blinking 12:00" became shorthand for a whole category of gadget anxiety. Yuen's insight was to move programming out of the machine entirely: the schedule lives in print, the code is a compressed pointer, and the box only needs to emit infrared at the right moment. The user performs a lookup in the most reliable database of the 1980s, the newspaper, instead of navigating menus on a tiny screen. The box emulated each household's own VCR remote, learned once during setup.

Gemstar sold the hardware to consumers and the codes to publishers — the PlusCodes that made the boxes useful. The company merged with TV Guide Inc. in 1999, and the listings service ran until the last PlusCode was published in 2010. The G-Code variant took the same scheme to Japan and ShowView did the same for much of Europe; both survived as physical rituals into the 2000s.

The museum's other printed-media devices are machine-scanned: Cauzin Softstrip and Pioneer LaserBarcode are read by a wand, and the TI Magic Wand reads barcodes. VCR Plus+ requires the human to read the code and type it — a hand-transcription ritual between print and machine, closer in spirit to a telephone number than a barcode.