Justin Jackson
Justin Jackson@mijustin
Replying to @manast
@manast Demand is cumulative: it almost always builds on top of pre-existing demand.

Telegraph ➡️ Landlines ➡️ Pagers ➡️ Car phones ➡️ Flip phones ➡️ Smart phones ➡️ Touchscreen phones
⟳ 0 ♡ 0