An entire personal knowledge management (PKM) guide. Learn to build a knowledge management system and gather information effectively. When we're on the subject of note-taking, lots of history's greatest minds took detailed notes of the intellectual pursuits.The origins of zettlekasten modern knowledge management software could be traced to inventor Vannevar Bush. In a 1945 article “As We May Think” Bush conceptualized a computer device called “Memex” capable of storing books, records, and other information. And it couldn't be much more relevant when discussed in the context of knowledge management. By consciously managing personal knowledge, you're effectively prepping yourself for professional and personal challenges coming your way.