From knocker-ups to human computers: the jobs that vanished within a generation.
Imagine explaining to a teenager that people were once paid to wake workers up by tapping on their bedroom windows with long sticks.
Or that thousands of people made a living manually connecting telephone calls, delivering telegrams, lighting street lamps, or performing calculations before computers existed.
According to business marketplace AnyBusiness.com.au, entire professions that once employed thousands of people have disappeared in little more than a generation as technology transformed how people live, work and communicate.
15 Jobs That Have Almost Completely Disappeared
| Job | What They Did | What Replaced Them |
| Knocker-Up | Woke people up before alarm clocks existed | Alarm clocks and smartphones |
| Switchboard Operator | Connected telephone calls manually | Automated phone networks |
| Telegraph Operator | Sent coded telegram messages | Email and messaging apps |
| Telegraph Messenger | Delivered telegrams by hand | Mobile phones and email |
| Lamplighter | Lit street lamps each evening | Electric street lighting |
| Bowling Alley Pinsetter | Reset bowling pins by hand | Automatic pin-setting machines |
| Ice Cutter | Harvested ice from lakes and rivers | Refrigeration technology |
| Computer (Human) | Performed mathematical calculations manually | Modern computers |
| Encyclopedia Salesperson | Sold encyclopedias door-to-door | Search engines and online information |
| Linotype Operator | Set newspaper type for printing presses | Desktop publishing software |
| Town Crier | Delivered public announcements in public spaces | News media and social media |
| Elevator Starter | Managed lift traffic in large buildings | Automated lift systems |
| Punch Card Operator | Entered and processed computer data | Modern software systems |
| Railway Signalman (Mechanical) | Operated railway signals manually | Computerised signalling systems |
| Video Store Clerk | Rented VHS tapes and DVDs | Streaming platforms |
Mary Tamvakologos, Director of Operations at AnyBusiness.com.au, said the list highlights how quickly industries can change.
“Most people assume the jobs around them will always exist because they are familiar. History shows that is rarely the case. Many of these careers were once considered stable, respectable professions. Entire training programmes, businesses and industries were built around them. What changed wasn’t necessarily the underlying customer need. People still wanted information, entertainment, communication and convenience. Technology simply created faster and more efficient ways to deliver them.”
While many of the jobs on the list disappeared gradually, others collapsed surprisingly quickly as new technologies became mainstream.
The rise of streaming services rapidly reduced demand for video rental stores. Search engines largely replaced printed encyclopedias. Smartphones effectively combined the functions of alarm clocks, cameras, maps, calculators, music players and numerous other standalone products into a single device.
Mary said the lesson is just as relevant for today’s business owners.
“One of the biggest mistakes businesses make is assuming current customer behaviour is permanent. The companies that survive major shifts are usually the ones paying attention to how consumer habits are changing before those changes become obvious. Every business owner should occasionally ask themselves a simple question: if this business was launched for the first time today, would it look the same? If the answer is no, there is probably an opportunity hiding in that gap.”
She added:
“History is full of examples of successful businesses that disappeared because they believed customers would always behave the way they did yesterday.
The businesses that endure tend to be the ones willing to adapt before they are forced to.”