1. The execution of a program that preempts the use of the processing system
   - foregrounding

Type of: priority processing

• Penstemon centranthifolius
• Penstemon cyananthus
• Penstemon davidsonii
• Penstemon deustus
• Penstemon dolius
• Penstemon fruticosus
• Penstemon linarioides
• Penstemon newberryi
• Penstemon palmeri
• Penstemon parryi
• Penstemon rupicola
• Penstemon rydbergii
• Penstemon serrulatus
• Penstemon whippleanus
• penstock
• pent
• pent-up
• penta-
• pentacle
• pentad
• pentaerythritol
• pentagon
• Pentagon Gang
• pentagonal
• pentagram