Here is an HTML example with the CSS class defined inline:
<!doctype html>
<html>
<head>
<style>
.YellowBackground {
background-color : yellow;
}
</style>
</head>
<body class="YellowBackground">
<h1>A yellow background</h1>
</body>
</html>
Answer:
Disk Operating System
Explanation:
"DOS is a platform-independent acronym for Disk Operating System which later became a common shorthand for disk-based operating systems on IBM PC compatibles."
A kilobyte (KB) is 1,024 bytes, not one thousand bytes as might be expected, because computers use binary (base two) math, instead of a decimal (base ten) system. Computer storage and memory is often measured in megabytes (MB) and gigabytes (GB). A medium-sized novel contains about 1 MB of information.