I used WordStar .WS back in the 80's and early 90's, but had to covert all of those I could to other formats fairly early on as WordStar faded away.
Through the Windows Era, I used RTF whenever possible over .DOC or DOCx files. It was a rare thing for me to have a working installation of MS Office.
I used both OpenOffice and Apache Office starting in the Windows Era, which has cross-platform versions for both Windows and Linux. After Windows died and I migrated to Linux, it's been mostly OpenOffice .ODT. But OpenOffice can both read and write quite a few formats, including the Windows formats like ,DOC and .RTF, as well as write .PDF files from any of the other formats.
For images, .JPG has been my go-to, but also .GIF if I needed to animate an image, .BMP if I needed absolute pixel-for pixel fidelity, .PNG if I need any transparency in an image. I avoid the newer .WEBP and WEBM formats like the plague. Image viewers are just now starting to catch up to those latter two formats, and I think the ones I actually use will likely be available for some time to come. I don't need any WEBP images that I can't actually see. If I download an image in one of those formats, I immediately convert it to some other format - ANY other format - using IrfanView.
For spreadsheets and the like, it's usually either a Windows Office format, or an OpenOffice format, with the occasional .CSV file which is mostly universal, but can retain less formatting information.
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Through the Windows Era, I used RTF whenever possible over .DOC or DOCx files. It was a rare thing for me to have a working installation of MS Office.
I used both OpenOffice and Apache Office starting in the Windows Era, which has cross-platform versions for both Windows and Linux. After Windows died and I migrated to Linux, it's been mostly OpenOffice .ODT. But OpenOffice can both read and write quite a few formats, including the Windows formats like ,DOC and .RTF, as well as write .PDF files from any of the other formats.
For images, .JPG has been my go-to, but also .GIF if I needed to animate an image, .BMP if I needed absolute pixel-for pixel fidelity, .PNG if I need any transparency in an image. I avoid the newer .WEBP and WEBM formats like the plague. Image viewers are just now starting to catch up to those latter two formats, and I think the ones I actually use will likely be available for some time to come. I don't need any WEBP images that I can't actually see. If I download an image in one of those formats, I immediately convert it to some other format - ANY other format - using IrfanView.
For spreadsheets and the like, it's usually either a Windows Office format, or an OpenOffice format, with the occasional .CSV file which is mostly universal, but can retain less formatting information.
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“Trouble rather the tiger in his lair than the sage among his books. For to you kingdoms and their armies are things mighty and enduring, but to him they are but toys of the moment, to be overturned with the flick of a finger.”
― Gordon R. Dickson, Tactics of Mistake
― Gordon R. Dickson, Tactics of Mistake