Shelley, who works in a dental office as an administrative assistant using a desktop computer for scheduling appointments, is most likely to use a washable and sterilizable keyboard. Such keyboards are preferred in dental and medical office environments because they can be wiped down or cleaned with antibacterial sprays without damaging the keyboard, reducing the risk of cross-contamination

. Regarding the type of keyboard mechanism, typical office desktop keyboards often use:

• Membrane keyboards , which are cost-effective, portable, and quiet, suitable for everyday office use.
• Scissor switch keyboards , which provide a balance between comfort and tactile response, are quieter than mechanical keyboards, and are commonly used in office settings for their slim profile and ease of typing

Given the dental office setting and need for cleanliness, a washable membrane or scissor switch keyboard is the most practical choice for Shelley’s desktop computer. Ergonomic or compact keyboards might also be used if she requires additional comfort or desk space, but the primary consideration in a dental office is hygiene and ease of cleaning