user13972: I'm not sure if these terms are interchangeable or not. What's the difference between ICSP and ISP? Is it simply the reset? I've shown two configurations in this question I just asked. Are they both ICSP?

user4143: The difference between ISP and ICSP is a hyphen.
ISP stands for In-circuit Serial Programming, and ICSP stands for In Circuit Serial Programming.
Any arrangement that allows you to program a microcontroller while it is in a circuit using a serial protocol can be called ISP or ICSP.

13972: <p>I'm not sure if these terms are interchangeable or not. What's the difference between ICSP and ISP? Is it simply the reset? I've shown <a href="https://arduino.stackexchange.com/questions/19129/what-is-the-proper-way-to-turn-an-into-an-isp">two configurations in this question I just asked</a>. Are they both ICSP?</p>
 4143: <p>The difference between ISP and ICSP is a hyphen.</p>

<p>ISP stands for In-circuit Serial Programming, and ICSP stands for In Circuit Serial Programming.</p>

<p>Any arrangement that allows you to program a microcontroller while it is in a circuit using a serial protocol can be called ISP or ICSP.</p>
