This document discusses various elements of HTML including the body, head, paragraph, font, and horizontal rule elements. It explains the attributes of each element such as background, text alignment, size, and color. The document also defines computer viruses and how they enter systems. Common virus types and preventive measures like avoiding untrusted USB drives are outlined. Anti-virus software is defined with examples like Quick Heal and Norton. The types of scans anti-virus performs including full system, memory, and mobile scans are listed. Finally, a table describing common email services like inbox, drafts, spam, and their functions is provided.