Direction: For items number 19-23, refer to the glossary below. laptop - smaller than a desktop computer mainframe - a very big and expensive computer microcomputer - most common type of computer minicomputer - smaller than a mainframe computer mobile device - a very small computer that can fit in your pocket tablet - a mobile computer that works using a touch screen 19. What does the given page show? A. index B. glossary C. thesaurus 20. What is a glossary? A. list of difficult words used in the book and their meanings B. list of topics arranged alphabetically C. list of synonyms and antonyms 21. Based on the given page, what does mainframe mean? A. a very big and expensive computer C. most common type of computer B. a mobile computer with touch screen 22. How are the words in the glossary page arranged? A. according to their order in the book B. alphabetically C. according to importance 23. If the word “smartphone” is to appear on this page, where should it be placed? A. after microcomputer B. after tablet ​