Index Cards

Correct Jyoho Card (コレクト情報カード), 5" x 3", 5mm section, 100 papers. Writing taste, hardness, the best index cards I've ever used. It's kind of "masterpiece".

I recommend "quadrille" index cards. Its grid provides you the base writing format. You don't need print the format from computer. Printing on index cards is not realistic, because PoIC will uses hundreds, thousands of index cards. You won't need printer for PoIC. The quadrille rule plays an key role for PoIC's tagging.

In case you can't find quadrille index cards, you can still use "plain" index cards. According to the reports from my friends in the world, it is difficult to get quadrille index cards. The plain index cards is available anywhere, and reasonable, too.

Ref. : @blog, 5x3 index cards