When I was at uni studying graphic design, students were required to create and maintain a detailed portfolio/diary (a folder or book full of any ideas, inspirations (photos, colors, etc), analog drawings, initial concepts, final concepts, etc) of any designs we created. These portfolios/diaries were not only used as the means by which students received their final mark, but also as a method to help prevent plagiarism (intentional or unintentional). These portfolios/diaries were also recommended as method by which we could protect our intellectual copyright and trademarks. I'm wondering how many people seeking freelancers to do logos and designs actually go out of their way to check the portfolios/diaries of the people they are looking to hire for work? I'm also wondering how many professional designers out there maintain such a portfolio/diary?