Before digital communication existed, businesses relied primarily on postal letters for official communication. Documents, instructions, contracts, and approvals were sent through physical mail. While this system allowed companies to exchange written information across cities and countries, it had a major limitation—speed. Letters could take several days or even weeks to arrive. If clarification was needed, another letter had to be sent, further delaying decisions. Important business activities such as approvals, negotiations, and project updates often took significant time because communication moved slowly.
