We'll use Schneier's one-time pad example, from Applied Cryptography.
For example, one-time assessments may not be representative of exposure to some chemicals, and this limitation should be explained.
The money is also used for one-time payments -- for example, for car repairs -- to alleviate immediate financial needs, so people never go on the welfare rolls.
So in exchange for the good stuff, give them some of their pet projects in return; for example, one-time rebates of the kind George Bush issued in 2001 and Gerald Ford in 1975.
Though it's a hassle for both the organizer and the payer in the long run, checks are often easier than pointing users to online tools like PayPal or setting up websites with payment mechanisms built-in solely for the purpose of a one-time fundraising campaign, for example.
Of course, if a customer was planning to use the coupon immediately, that step isn't necessary – they could just launch the coupon and show it to the cashier at point-of-sale without storing it for later use (as would be appropriate for one-time use coupons, for example).
Research evidence increasingly demonstrates that brief interventions (for example, one-time workshops) are not sufficient to change adult behavior with children (Winton 2008; Winton and McCollum 2008).
In a standard survival analysis there is one event (for example, death) and one time (for example, days until death).
Two-factor (or two-step) authentication (2FA) works by looping in another security layer — by requiring not just a username and password to be entered to access a service but, for example, a one-time code that is generated on a user's mobile device.
Sometimes – for example, Robert Maxwell, one-time owner of the Mirror – they just want an ego trip.
