To transfer a text document (Word, PDF, or text file) from a PC to a TI-Nspire CAS, users can utilize the TI software installed on their PC. The process involves dragging a file from the computer to the Nspire, similar to how files are transferred from the Nspire to the computer. For those considering the TI-Nspire, many users report satisfaction with the transition from older models like the TI-89, highlighting improved ease of problem entry and readability of results. The CAS functionality is only available on specific models, and users must purchase the CAS version to access these features. Additionally, online tools are available for converting images and PDF files for compatibility with the TI-Nspire. Searching within a text document on the TI-Nspire is also a topic of interest among users.