Based on the identifier , this refers to Dave's Short Journals (DSJ) , specifically Journal #4 , covering the dates surrounding November 2013 . In the mechanical keyboard and "DataHorder" communities, DSJ is renowned for the discovery and preservation of the Cherry MX "Ergo Clear" switch—a switch type that was rare, never officially sold to the public in bulk, and highly sought after for its "perfect" tactile feel. Fractional Precipitation Pogil Answer Key 2021 Info