Paul O'Brien

Paul O'Brien

Paul O'Brien writes about software, digital resilience, and business continuity. Technical background, pragmatic perspective—exploring the operational trade-offs between convenience, privacy, and control.

62 posts

The History of Email: From ARPANET to Today

Email began as a simple way for researchers to leave messages on networked computers. Decades later, it remains one of the few communication systems that works across companies, countries, and devices — and still underpins much of our digital life.