If you really want to know the difference between security and resilience, pour yourself a cup of strong coffee and dig into the all-but-impenetrable PPD-21, Presidential Policy Directive—Critical Infrastructure Security and Resilience. Web Scraping (also termed Screen Scraping, Web Data Extraction, Web Harvesting etc.) is a technique employed to extract large amounts of data from websites whereby the data is extracted and saved to a local file in your computer or to a database in table (spreadsheet) format. Data displayed by most websites can only be viewed using a web browser. Sep 27, 2019 · Vocabulary Week A, TTT, Quizlet Form, Quizlet Link Vocabulary Week B, TTT, Quizlet Form, Quizlet Link Vocabulary Week C, TTT, Quizlet Form, Quizlet Link Vocabulary Week D, TTT, Quizlet Form, Quizlet Link *Vocabulary Quizzes are given on the Friday at the end of the second week of activities. Web Browser: A web browser, or simply "browser," is an application used to access and view websites . Common web browsers include Microsoft Internet Explorer, Google Chrome, Mozilla Firefox, and Apple Safari.