I buy fonts from time to time, to use for website graphics and also for printed promotional pieces that match the website. Out of habit from years past, I've bought them in PostScript format. As I continue to buy them from time to time, which format should I be buying? I'm using Photoshop under Mac OS X. Note: I know there are free fonts available too, but for these professional uses we buy through our regular suppliers and the expense is not a concern. So we could buy each font in multiple formats to make this question moot, but that seems silly without a good reason. When I see fonts sold with choices ofPostScript for Macintosh OpenType for Mac or Windows PostScript for Windows TrueType for WindowsI'm no longer sure which would be best. Either PostScript or OpenType will get the job done, but I'm not sure how to decide. If I switched to OpenType, then in theory one of my Windows-using coworkers could use the font too (they come with a 5-computer license). That hasn't happened so far (I'm the only one using purchased fonts) but it gives me that flexibility. Some OpenType fonts have extended glyph sets (more characters), which would be an advantage if I wanted one of those fonts. So far, that's hypothetical too. Are there other advantages to switching to OpenType? Are there advantages to sticking to PostScript besides?