k was SO sophisticated that many security experts thought a government, not an individual, planned it. WannaCry attacked hospitals, banks, and over 300 computers in hundreds of countries worldwide. Microsoft had issued a patch, which it classified as critical. However, it was ignored by many organizations, highlighting the criticality of keeping patches up-to-date. PRIVACY Privacy is the ability of people to control who sees information about them. It includes the ability to not share private information such as social security numbers, birthdates, job applications, and medical information. Privacy often conflicts with merchants' desire to use personal data for business purposes. For example, information about consumer buying habits is a source of valuable information for advertisers who purchase ad space on the Internet. However, it can also create issues for people concerned about privacy. Software used by marketers is able to add small software files to browsers. These software files track which sites an individual visits. For example, if a user clicks an ad containing a video that uses Adobe's Flash or HTML5, the advertiser can compile a list of sites that he visits www.TechnicalPDF.com after clicking the ad. With this information, it can display ads based on what these habits suggest about his interests. For instance, advertisers might display ads about sporting events to people who visit sports-oriented sites. When a shopper purchases, say, a skirt online or even browses for skirts, advertising networks can automatically display ads about these types of clothing to the purchaser when they visit other sites. In addition, information gathered in this manner from social networks is a powerful way to attract advertisers. In turn, advertising networks that use bots, small programs programmed to automatically collect information, place ads at many different sites and help amass large databases of demographic information about users' browsing and purchasing habits. Another way that marketers collect information ab