My online labnotebook has seen several iterations over the years, from directly using this wiki, using Google Spreadsheet, using a text file with Dropbox, to Evernote.

Since 2013 I have been using IPython Notebook as my notebook, hosted on GitHub.

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In order to make my research activity more accessible and provide a chronological framework, I am currently experimenting with

Integrating all activities into a central portal.
[ http://sr320.tumblr.com/rss]

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For Historical Perspectives... this page has some of the early iterations of my notebook.