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1. Wim ???? (wim_v12e@octodon.social)'s status on Monday, 12-Apr-2021 02:12:46 JST Wim ????

   I got a very special present from my PhD student on finishing their PhD.

   In 1937, IBM launched the IBM 805 Test Scoring Machine, the first device for processing standardized tests. However, the marks could only be read using a special graphite that was highly conductive. This lasted until the 1960s when the electrical conductivity method was replaced by optical mark recognition. The Dixon company produced this pencil, the Sense-a-mark 2100, for a long time but now it is a collector's item.

   • とねぢ ＠Minoh-don（ash） (toneji@minohdon.jp)'s status on Monday, 12-Apr-2021 02:12:45 JST とねぢ ＠Minoh-don（ash）

     in reply to

     @wim_v12e Very good pecil.Please keep, don't use:)

   • とねぢ ＠Minoh-don（ash） (toneji@minohdon.jp)'s status on Monday, 12-Apr-2021 03:13:24 JST とねぢ ＠Minoh-don（ash）

     in reply to

     @wim_v12e It's right:)

   • Wim ???? (wim_v12e@octodon.social)'s status on Monday, 12-Apr-2021 03:13:25 JST Wim ????

     in reply to

     • とねぢ ＠Minoh-don（ash）

     @toneji I has never been sharpened and I intend to keep it that way :)