Like some other posters on this thread, I'm a heavy Palm user, and I have mine with me most of the time. I also have some potentially pro-survival things on there like star charts and a solar compass. <br><br>But seriously, these computers are somewhat delicate, are completely dependant on the battery, which may or may not have much life left when you need it, and are hardly water resistant. Also, unless you have a GPS or wireless connection, which I do not, all you are going to get from them is essentially reference information. My feeling is that reference information could be more convenient and reliable in a non-electronic form, and in any event, the skills and knowledge that aren't already mastered when you need them would be difficult to master in a survival situation just using reference materials anyway. <br><br>A Palm isn't going to light a fire, keep you warm or dry or pruify your water for you. I don't see much value in having one in a survival situation, unless boredom becomes a factor and you have some novels in there. Or maybe for those who believe a religious text is important survival gear.<br><br>Of course, PresumedLost illustrated how exhaustive reference information can be very helpful in many circumstances of daily life and that is why I carry one, but I'm talking about a real down-and-dirty am-I-doing-to-live-through-the-night survival situation.<br><br>However, since many of us carry them anyway and are therefore likely to have one on us should we ever find ourselves in a survival situation, it makes sense to have some useful references in there just in case you can make use of it.<br><br>I wouldn't mind having an illustrated edible plant reference and maybe something similar to an illustrated version of the SAS survival guide to supplement some hard-copy survival cards. Anybody know if these references are available in Palm format?