From shared computers to office habit
Messaging between users of the same computer existed in the 1960s on time-sharing systems, where several people logged into a single machine. As networks developed, mail between different machines followed, and on research networks such as the ARPANET it became widely used in the early 1970s. The details of who deserves credit for particular steps are often discussed differently in different accounts, so it is safest to say that several people contributed.
For most office workers, though, email did not arrive until much later. It spread in business settings from the 1980s onward, first inside single organizations that had a shared computer system or a local area network, then increasingly between companies as outside connections became available. By the 1990s it was standard in many offices, and by the 2000s it was hard to find a white-collar workplace without it.
What it replaced
Before email, organizations communicated through a handful of channels:
- Typed or handwritten memos, copied and sent through internal mail
- Telephone calls and message slips left by receptionists
- Meetings, whether scheduled or impromptu
- Letters, telegrams and, later, fax machines for communication between organizations
Each of these had friction. A memo might take hours or days to reach everyone on a list. A phone call required the other person to be available. Email reduced both problems: a message could be written once, sent to many people, and read when convenient.
Changes in how organizations worked
Speed and reach. Messages crossing a building or a continent took roughly the same effort. Teams in different offices could coordinate without waiting for post or scheduling a call, which helped organizations spread over several locations.
A written trail. Email left a searchable record of who said what and when. This made it easier to confirm decisions, but also meant that casual comments could be saved, forwarded or later used in disputes. Legal and regulatory concerns about retention and records grew along with the technology.
Flatter access. Because a message could be sent directly to almost anyone, workers sometimes bypassed traditional chains of command. Researchers and commentators have debated how far email actually flattened hierarchies, and the answer seems to vary by organization. Some managers welcomed the direct line to staff; others found that it added noise.
Attachments and shared documents. Once files could be attached, drafts moved back and forth between colleagues. This worked well for simple cases but led to confusion over which version was current. The practice shaped later tools for shared editing, which tried to solve exactly that problem.
Work moving beyond the desk. Mail could be checked from home, and later from phones and portable devices. Many people appreciated the flexibility. Others reported that the boundary between work and home became harder to keep. Studies on this topic reach differing conclusions, and individual experiences vary a great deal.
The problems that came with it
Email’s strengths created weaknesses. Because sending was cheap, volume grew. People complained about “information overload”, about copying everyone “just in case”, and about long threads where no one knew who was responsible for what. Messages lacked tone, so jokes or short replies could be misread.
Spam, unwanted bulk mail, became a major nuisance as email addresses became common, and it pushed organizations to adopt filtering and to think harder about computer security. Phishing, in which attackers pose as a trusted sender, became a recurring risk, and training employees to recognize it became a standard part of workplace routines.
Etiquette and adaptation
Organizations and individuals gradually developed norms. Many offices adopted rules or habits such as writing clear subject lines, limiting the use of “reply all”, keeping messages short, and choosing a phone call or a face-to-face talk for sensitive matters. These norms were never uniform, and they continue to change.
Newer tools, including chat systems and project-management software, took over some of the roles email had filled. Email did not disappear, however. It remained the common denominator for formal communication, for messages between organizations, and for account notices of every kind. That is partly because it is an open system that works across different providers, rather than a feature tied to one service. For the early technical story, see the history of electronic mail.
What the history suggests
Email is a good example of a technology that was introduced mainly to make an existing task faster, and then changed the task itself. People wrote more, expected quicker replies, and had to learn how to manage their attention. Whether this has made offices more productive is hard to measure and still debated. What is clear is that it changed daily routines for many workers, and that the habits built around it were shaped as much by people and organizations as by the software.