About 90 per cent of computer users don't use CTRL-F to search for a word - as they don't know such a keyboard shortcut exists, a Google survey found.
The results stunned Google's Uber Tech Lead for Search Quality and User Happiness, Dan Russell.
"I interviewed a bus driver who was searching for a transportation rule for a test," Mr Russell told the New Scientist magazine in an interview published yesterday.
"She was scrolling line-by-line through a 100-page web document, so I asked her why she didn't use 'control+F' to search by keyword. It turns out she didn't know about this absolutely basic browser function."
(NB: Where the CTRL-F "find" box appears on your computer screen depends on which browser you use - for instance, a box will appear top left of your computer screen if you use Internet Explorer, bottom left if you use Firefox, top right if you use Chrome.)
So how can 90 per cent of users not be aware of this simple but useful shortcut?
Mark Pesce, a futurist and honorary associate in digital cultures at the University of Sydney, said it was all about the lack of education.
"I really think there's been no effort at any level - whether it's in a company or school or even nationally - to teach people.
"I think we just all assume that we all know it, but no one actually does."
Mr Pesce said the responsibility to educate the public on such tools could fall on librarians, who use search tools as part of their job.
He told public librarians at their annual meeting this month they were "going to be principally responsible for training a nation that's about to get a National Broadband Network, [and] that has no idea how to use it".
"The problem exists because people are habitually trained by what they always do on computers and they don't go beyond that.
"Librarians shouldn't have to educate everyone. They should simply be capable of training people who can then train other people."
Mr Pesce also criticised the search giant for not educating its users on how to use its tools.
"I think it's a little rich for Google to be talking about what users do and do not do because Google offers no training," he said.
"Doing these things is not hard. It just takes effort [and] dedication to educating your user base."
So what other keyboard shortcuts should computer users know about? (For Windows OS. Swap CTRL for Apple's Command key):
CTRL-F or F3: to find a word or words on a page
CTRL-C: to copy text
CTRL-V: to paste text
CTRL-Z: to undo a command
SHIFT-CTRL-Z: to redo the command above
CTRL-S: to save
CTRL-B: to bold text
CTRL-I: to italicise text
CTRL-U: to underline text
CTRL-X: to cut text
CTRL-A: to select all
CTRL-O: to open a file
CTRL-P: to print
CTRL- "-" or "+": to reduce or increase font size on a webpage
And more ...
WIN-L: to lock your desktop (Windows)
WIN-D: to show your desktop (Windows)
F5: to refresh a page
ALT-Print Screen: to capture a screenshot of a window on your desktop
ALT-Home: to go to your browser's homepage
CTRL-T: to open a new tab in your web browser
CTRL-TAB: to scroll through the tabs on your web browser
CTRL-W: to close a window on your web browser
CTRL-Home: to go to the start of a sentence
CTRL-End: to go to the start of a sentence
CTRL-"?" or "?": to move to the previous or next word
CTRL-SHIFT-"?" or "?": to select the previous or next word
Further reading: 100 keyboard shortcuts (Windows)Mac shortcutsLinux shortcuts
View the story "Keyboard shortcuts - what do you know?" on Storify]