10” slide rules
Hemmi, made in Japan, c.1954
Aristo, made in Japan, c. 1960
Royal, made in Japan, c.1960
The first slide rulers were developed in the C17th, for mathematical calculations. 138 more words
Reaching an audience through social media can be maddening. But even more so by using the wrong channels.
Because social media marketing is a time-intensive chore, we must figure out which networks to use from the start. 375 more words