USPSA rule 9.11.11 allows the use of PDA's or handheld computers for the collection of scores, provided the program has been approved by the USPSA president. The approvals listed below are currently in effect. Please note that both of the listed programs are commercial products that are not available from USPSA. Support for these products may be obtained directly from the vendor.
USPSS - Palm based Auto Scoring System from Peter Cunningham, email@example.com
Stagescore - Palm based scoring system from www.stagescore.com