If you want to experiment with either of those products, NVDA is entirely free and Jaws has a free version that requires a re-boot after each 45 minutes of usage.
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གྲོས་བསྟུན་འདི་བསྡམས་ཡོདཔ་ལས་ ལན་གསལ་བརྐྱབ་མི་ཚུགས་