Ernes Fernandez answer is an excellent one and no need for me to go over what he already did but Ill expand on some of his points on why you should buy a Mac over a Windows PC. There is a reason the Operating system easier to use its perfected every 18 months. Since 21 the year Apple released Mac OS X 1.1 and Windows came out with Windows Vista Windows has released 3 Operating systems. After Vista came Windows 7 a huge hit Windows 8 the OS that people say UUGGHH when you say the words WINDOWS 8 to them and Windows 1 A better version of Win7 or so they think but it has some windows 8 features in smarter useage yet still windows users yearn for Windows 7. Apple has released 11 operating systems almost 4 to 1 ! But each Mac release is not met with dread Mac users flock to the internet to download their newest operating system because unlike with Windows the new OS always brings about some new features and they go well on the machine you already have. Plus they dont slow down yourputer as you go forward for the most part (not counting any 32bit vs 64 bit issues). ordered-list You had OS X 1.2 Jaguar which improved upon 1.1 because it needed to (To be honest OS X 1.1 while a HUGE improvement over OS9 was not as polished as Windows Vista) But by OSX1.3 Panther Mac took the lead in operating systems.. 1.4 Tiger introduced the best search system with Spotlight Smart Folders which are folders you create that search for keywords and these folders are actively filled with what you tell them to search for. That ties Windows releases since 25 however apple released 1.5 Leopard which helped Apple get through the transition from POWER PC cpus to intel (see item 2 below). Leopard introduced Time Machine by far the easiest and best backup system every invented. By simply hooking a hard drive up and turning it on T.M. backs up your mac and gives you the simplest yet most powerful and elegant search method possible. Unlike windows restore which only restores the system functions to an earlier point Time machine finds things that are no longer on your hard drive because you deleted them by accident or on purpose and lets you put them back where they were! Snow Leopard was 1.6 and dropped the cost of an OS to 35 dollars! It improved upon Leopard in the transition to intel CPUS and 64 bit architecture. You see with Mac if you have a 64 bit CPU it installs a 64 bit OS. Unlike Windows which offers 32 and 64bit versions of all their systems adding to confusion. Its bad enough you have to decide between Windows 7 Home Win 7 Home premium Win 7 Pro then you have upgrade disks or full install disks of each and 32bit and 64 bit versions of each! The mac alternative? 1 OS that gives you ALL the features possible not taking some away for less money. (Back when apple charged for OSes. Since 211 Mac OS 1.7 and up have been free). 1.8 Mountain Lion was an improvement on Lion and started to add on iOS features to the desktop making the Mac similar to the iPhone and iPad in its use. After an all CATS NAMES period Apple now names its OS after famous California landmarks starting with Mavericks in 1.9 that added more iOS features like iBooks and Maps 1.1 Yosemite which mimicked IOS color scheme and El Capitan which was full of refinements more than anything. Sierra is the current Mac OS and the X has been dropped so it joins familiarity of other Apple ones iOS tvOS and watchOS. Siri was the big add on here. So 4 times the Operating System releases the last half dozen or so free each refining and improving upon the process ever so slightly backwardspatible to where you can put on a lot of 29puters. 2) You may have heard Macs are expensive and you have to have special parts for your mac; this was in the old days of Apple before OS X and way before apple switched to intel CPUs. Macs use industry standard parts the same ram you buy for a Dell you buy for a Mac. The Hard Drives the same The only difference is the language they speak which is the formatting of the hard drives. But Macs and PCs network together wonderfully. Because of this industry standard parts you can natively install Windows on a Mac and boot into Windows. Also its what you get for that cost. Out of the box PDF support make read annotate PDFs. In Windows you better install Adobe first. or activate it if ites with it. For the longest time just installing Windows on aputer would not even give you DVD had to install the license by adding a DVD player app. usually theputer maker did that along with tons of other Bloatware. Touching on Ernes point no. 5 another part of the cost is the integrated apps that work seamlessly with each other and the Operating System. Also point 4 the Apple eco system; while you can use iTunes on a PC they all seem to work better on a Mac. So these apps like iMovie Garage Band and Photos give buyers powerful almost professional tools to take advantage of their digital lifestyle. Into taking videos with your iPhone? turn them into professional looking Movies with iMovie. Amateur musician? record your own song with GarageBand with you recording every instrument (and you dont have to be a musician you can just add in your little bits using the keyboard). Edit your photos in Photos and all of this stuff just works. 3 and Final Point- Because to me that is the selling point. My new family of in laws and such were allputer illiterate and I tried telling them 4 years ago that Apple is better across the board. They tried in vain to get their photos to play on their TV. They bought devices like Chromecast they followed advice of Tech Support when they wanted to conference from Phone to sisters laptop. Slowly but surely they have converted over getting an apple TV which lets you put yourputer screen on the TV and you do it with two clicks. Thats it no setting up anything just having both devices logged into the same network. They call the sister with FaceTime on the iPhone and conference with FaceTime on the MacBook. They access their files on their homeputer when they are here in Florida with Back to my Mac a feature that can be done on Windows PCs but withplicated set up procedures . Thats the biggest difference you seem to have to be a Systems Administrator to do anything on Windows but children and my mom can use a Mac or iPad. and the features just always work with little setting up to do. And while that price may be more right now.. its a value that stays with you for a long time. Do a search on ebay for yourputer make and model and on the left side click the SOLD LISTINGS to see how much they have sold for recently. Macs hold their value so much longer I sell 1 year old MacBooks for 45 dollars. A windows notebook that old would sell for 5. if at all.
How was the PDF format created?
I was there for the whole thing. It was the 9's and Adobe was doing well. In addition to the Systems department which handled the Postscript business there was an Applications group which had Photoshop and Illustrator. John Warnock had the idea that every document that was ever printed or ever would be printed could be represented in a document. This was not an unreasonable idea since Postscript was designed for this purpose and Adobe also had some code from Illustrator that would handle the fonts and graphics and code from Photoshop to display s - this would be the second file format for the project. However there were requirements that were not being met. Requirements like forward and backwardspatibility streaming large documents through a printer driver where the printer driver has no idea how many pages there will be and opening a 1 page document and being able to jump directly to the 5th page without reading the whole file. Peter Hibberd had written a demo of an 'object oriented file format' so Richard Cohn and Alan Wootton went to work trying to adapt his work for use on the Carousel project. After many weeks of struggle it was decided that adapting his work was going to be more work than writing new code and that some of the 'object oriented' concepts were not applicable since it was finally bing obvious that a key-value format was going to be part of the solution. This was the third file format. Bob Wulff the manager of the project told Richard and Alan to 'go away' and to note back until there was a file format! The next Monday Richard and Alan started meeting at Richard's house in Menlo Park instead of going to work in Mountain View (where Google is now). By the end of Thursday Richard and Alan had described data structures and concepts for a file format on many pieces of paper. Alan went home pulled 4 overnights in a row and came back to Adobe on Monday with the fourth file format written and working in the current code. This file format became known as PDF.