DOS

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DOS (Disk Operating System)

a COMPUTER program which enables a computer to record and retrieve data from a rotating magnetic or vinyl disk. The most widely-used disk operating system is MSDOS, which is used on computers that are compatible with the IBM personal computer.
References in classic literature ?
He must now consign the patient to her care; and he proceeded to repeat to her Lydgate's directions as to the quantity of each dose.
Ransome carried off two big doses to the men forward.
Without waking him, she went back, and after a second dose of opium she fell towards morning into a heavy, incomplete sleep, during which she never quite lost consciousness.
In that case we may fairly hope that a repetition of the dose will lead, in a greater or lesser degree, to a repetition of the result.
When the wound was fairly closed, the captain washed it with rum, and administered a second dose of the same to the patient, who was tucked in for the night, and advised to compose himself to sleep.
In quantity, the formula prescribed twelve hundred words minimum dose, fifteen hundred words maximum dose.
And Duson died from a dose of that same poison, a packet of which you procured secretly from Emil Sachs.
His mother put him to bed, and made some camomile tea; and she gave a dose of it to Peter!
If Oz had taken a dose of the same courage he gave me," added the Lion, "he would have been a brave man.
These last words were a dose almost too bitter to be swallowed.
A lady in England lost her life by taking a similar mixture: the precipitated strychnine collected at the bottom, and in taking the last dose she swallowed nearly all of it
Have some of this," said he, and gave me a dose of some scarlet stuff, iced.