Computer application software for mobile phones, handheld computers, and tablet computers, namely, software for enabling users to send or create sales orders, estimates, memos, invoices, allows signatures to be digitally signed, tracks paid, unpaid and partially paid invoices, sends e-mails to clients with payment options, allow previews, printing and voided orders, allows viewing of item codes and product lists and enables or disables sales tax on products, gives options for single or multip...