Intangible assets are generally the result of acquisitions and consist primarily of purchased technology and customer related intangibles. Intangible assets are amortized over useful lives that range between 1 to 20 years.

The following tables present the cumulative composition of the Corporation’s intangible assets:


	March 31, 2024						December 31, 2023
(In thousands)	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Technology	$	307,207	$	(198,552)	$	108,655	$	308,256	$	(195,446)	$	112,810
Customer related intangibles	669,065		(346,171)		322,894		670,966		(339,325)		331,641
Programs (1)	144,000		(43,200)		100,800		144,000		(41,400)		102,600
Other intangible assets	54,042		(44,056)		9,986		54,227		(43,666)		10,561
Total	$	1,174,314	$	(631,979)	$	542,335	$	1,177,449	$	(619,837)	$	557,612

(1) Programs include values assigned to major programs of acquired businesses and represent the aggregate value associated with the customer relationships, contracts, technology, and trademarks underlying the associated program.

Total intangible amortization expense for the three months ended March 31, 2024 was $14 million, as compared to $16 million in the comparable prior year period. The estimated future amortization expense of intangible assets over the next five years is as follows: