Why an error in Computer is Known as BUG???

This is what wikipedia has to say about it: The invention of the term is often erroneously attributed to Grace Hopper, who publicized the cause of a malfunction in an early electromechanical computer. A typical version of the story is given by this quote: "In 1946, when Hopper was released from active duty, she joined the Harvard Faculty at the Computation Laboratory where she continued her work on the Mark II and Mark III. Operators traced an error in the Mark II to a moth trapped in a relay, coining the term bug. This bug was carefully removed and taped to the log book September 9th 1945. Stemming from the first bug, today we call errors or glitch's [sic] in a program a bug." Hopper was not actually the one who found the insect, as she readily acknowledged. And the date was September 9, 1947, not of 1945. The operators who did find it (including William "Bill" Burke, later of the Naval Weapons Laboratory, Dahlgren Va. ), were familiar with the engineering term and, amused, kept the insect with the notation "First actual case of bug being found." Hopper loved to recount the story. So here's your answer :)

i don't know the actual story but take an example of a bee. Bee is a bug and in summer a bee always try to disturb you while doing your work it will make you angry and wont let you to do or complete your work in peace and harmony same is the case with computer bugs they always give you problems while doing you work and will waste your time so i think thats is the story or reason :) that a computer problem is always called a bug.