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Definition - What does CONFIG. ... SYS is a configuration file on DOS systems. It is a text file that contains the settings and commands to load drives in a DOS system. This is a primary configuration file for OS/2 and DOS OS. This file was introduced in DOS and is replaced for 32-bit Windows versions with CONFIG.
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Answer: scale (chemistry), the range of mass or volume of a chemical reaction or process.
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The oldest malware vector was emails.
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Websites were not widespread early on into the internet, however it was very easy to have a virus that uses an email contact list, where it can send itself to other email addresses and spread.
The answer is C, ROM often stores the basic instructions a computer needs when powering on, part if the BIOS.