https://philofaxy.blogspot.com/2017/02/the-great-organiser-hole-spacing.html

https://www.ebay.com/itm/276403515343 <br /> archived copy

In 1984, Memindex was selling monthly planning calendars (pocket notebook size with spiral binding and a case) rather than their older small index card sized formats. Their calendar format looks eerily like what Day-Timer, a division of ACCO Brands, has been selling since at least the early 1990s.

This goes down to even the "cut here" triangles in the lower right corners of pages to help bookmark the current page.

reply to u/taurusnoises (Bob Doto) at tk

Yep, for almost a full year now on 4x6" index cards. (Receipts for the kids: https://boffosocko.com/wp-content/uploads/2023/07/wp-1688411021709-scaled.jpg)

Previously I'd used a Hobonichi Cousin (page per day) journal for this. (Perhaps I should have stayed with the A6 size instead of the larger A5 for consistency?) Decades ago (around 1988ish?) I had started using a 2 page per day DayTimer pocket planners (essentially pre-printed/timed index cards spiral bound into monthly booklets which they actually shipped in index card-like plastic boxes for storage/archival purposes). Technically I've been doing a version of this for a really long time in one form or another.

It generally includes a schedule, to do lists (bullet journal style), and various fleeting notes/journaling similar to the older Memindex format, just done on larger cards for extra space. I generally either fold them in half for pocket storage for the day or carry about in groups for the coming week(s) when I'm away from my desk for extended periods (also with custom blank index card notebooks/pads).

I won't go into the fact that in the 90's I had a 5,000+ person rolodex... or an index card (in the entertainment they called them buck slips) with the phone numbers and names of \~100 people I dealt with regularly when early brick cell phones didn't have great (or any) storage/functionality.