As most of the history community returns to work from summer vacation and research trips, it seems like an apt time to revisit our history hashtags compilation and discover where and how that list has grown. When Lis Grant originally published the list in early 2012, she found roughly 25 history-specific hashtags by #Twitterstorians. After a number of hours of scouring Twitter and crowdsourcing her original list, I found the list has grown to over 60 commonly used history hashtags.

Instead of collecting the hashtags in a static list, I thought it might be interesting to assemble them into a visual interface of groups using Pearltrees. The advantage of visually curating the list allows us to see how interconnected the history twittersphere is becoming, and where we might be seeing large holes and gaps. For example, there are a number of digital history hashtags, but teaching history hashtags still remain in the minority (although I rely on my fellow Twitterstorians to tell me what I might have missed).

In order to see the full scope of the “History Hashtag” Pearltree, click each pearl (or section icon), and watch as it reveals a number of related history hashtags.

What did we miss? Either tweet us at @AHAHistorians or comment below!

This post first appeared on AHA Today.