Innovative Solutions and Support (ISSC) 8-K Changes in Registrant's Certifying Accountant

Exhibit 16.1

	Deloitte & Touche LLP
	1700 Market Street
	Philadelphia, PA
	USA
	Tel:   +1.215.246.2300
	www.deloitte.com

January 8, 2014

Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549-7561

Dear Sirs/Madams:

We have read Item 4.01 of Innovative Solutions and Support, Inc.’s Form 8-K dated January 8, 2014, and have the following comments:

1.We agree with the statements made in sentences 1, 4, 5, 6, 7 and 8.

2.We have no basis on which to agree or disagree with the statements made in sentences 2 and 3.

Yours truly,

/s/ Deloitte & Touche LLP