Why does Pinterest view Google as its primary competitor? Why does Pinterest focus on the smartphone platform when it develops new features and products?

Explore the evolution of mobile operating systems and their impact on the smartphone industry, considering key players like Android and iOS.

Why does Pinterest see Google as one of its biggest rivals? Pinterest prioritises the smartphone platform while creating new features and products. Why is it so?

Suppose you are a judge trying to decide a dispute between a buyer and a supplier. The buyer claims not to have produced a particular email purchase order, while the supplier shows you the purchase order, and certificates and CRLs (Certificate Revocation Lists), demonstrating that the purchase order was signed by the buyer. All documents have been signed by a notary. How would the dates on the various pieces of evidence influence your decision? What if only the purchase order was signed by the notary?