GCC stands for GNU C Compiler, it's a solid compiler that works well on the *nix kernels, there's a port of it on cygwin which is arguably slower but still works. Whether it's the best or not depends on what platform you are working on and with what you're trying to make on it.
Standard Postcard-a standard postcard mails First Class at current rate of 35Â¢. The smallest maiLabel size for ANY postcard is 3Â½â³ x 5.â³. The largest postcard size for mailing at the 35Â¢ rate is 4Â¼â³ x 6.â³. The paper thickness must be at least 0.007 â³ and not more than 0.016 â³ in thickness.
Pick the standard size (or whatever size you want) and measure it. That way you know exactly which one you're designing for. I believe the standard ones are around 4in x 6in (one on side), which would make the full card around 8in x 6in. Thanks. I asked over here cuz well I was kind of lazy to go to the store to grab a card and measure it. I just use the double 5X7 post card size. It is 10X7 flat. You can get standard sized envelopes for these. Just do a Google search and you can find a manufactorer of these. For the printing of the cards, you can go to Post Card press and they will give you a quote for this.