ZIP files can contain multiple files of different types. A tax accountant ZIPs and emails a copy of a person's federal and state tax returns for review before filing with the IRS.
#PKWARE DECK ZIP FILE#
This makes the ZIP file format convenient for sharing and distributing groups of files. When this is done, the path and folder information of the file tree is preserved inside the ZIP file. In addition to compression, ZIP files are archives that can group together multiple files and folders. In the cloud, ZIP files are commonly found as both Gmail attachments, as well as files stored in Google Drive or other cloud-based storage systems such as Dropbox and Microsoft OneDrive. Today, the ZIP file format remains in heavy use in the internet and in the cloud, with billions of such files in circulation. Once received, the ZIP file would then be opened and its contents decompressed ("unzipped") onto a user's computer. It also allowed for multiple files and folders to be grouped together ("zipped") and transferred as a single ZIP file. Using ZIP compression regularly saved minutes or even hours off of file transfers. In this era, file transfers occurred using MODEMs and transfer speeds were very limited. The ZIP file format dates to the late 1980s when it received heavy use in pre-internet-era Bulletin Board Systems, or BBSes. The ZIP file format is very popular for efficiently storing and transferring groups of files in a variety of business and personal applications. 152ZIP files are compressed archives that group together one or more files into a single file, compressing the files (making them smaller) that are contained inside. Storage types, or the ghost in the machine. General comments on the statistical commands įrom interactive work to working with a do-file. Interrupting a command and repeating a command.
LATEX 2ε is a trademark of the American Mathematical Society. Stata and Stata Press are registered trademarks with the World Intellectual Property Organization of the United Nations. , and NetCourse are registered trademarks of , Stata Press, Mata, Stata, StataCorp LP. Published by Stata Press, 4905 Lakeway Drive, College Station, Texas 77845 Typeset in LATEX 2ε Printed in the United States of America 10 9 8 7 6 5 4 3 2 1 ISBN-10: 1-59718-110-2 ISBN-13: 978-1-59718-110-5 Library of Congress Control Number: 2012934051 No part of this book may be reproduced, stored in a retrieval system, or transcribed, in any form or by any means-electronic, mechanical, photocopy, recording, or otherwise-without the prior written permission of StataCorp LP. First edition 2005 Second edition 2009 Third edition 2012
4 General comments on the statistical commandsġ0 Regression models for categorical dependent variablesġ2 Do-files for advanced users and user-written programsĬ 2005, 2009, 2012 by StataCorp LP Copyright All rights reserved.