We operate in two reportable segments: (1) Network Solutions and (2) Services & Support. Network Solutions includes hardware products and software defined next-generation virtualized solutions used in service provider or business networks, as well as prior-generation products. Services & Support includes our suite of ProCloud managed services, network installation, engineering and maintenance services and fee-based technical support and equipment repair/replacement plans.

We evaluate the performance of our segments based on gross profit; therefore, selling, general and administrative expenses, research and development expenses, interest and dividend income, interest expense, net investment gain, other income (expense) and (provision) benefit for income taxes are reported on a company-wide, functional basis only. There is no inter-segment revenue.

The following table presents information about the reported sales and gross profit of our reportable segments for the three and six months ended June 30, 2019 and 2018. We do not produce asset information by reportable segment; therefore, it is not reported.

	Three Months Ended
	June 30, 2019				June 30, 2018
(In thousands)	Sales		Gross Profit		Sales		Gross Profit
Network Solutions	$	139,167	$	58,992	$	115,063	$	45,434
Services & Support		17,224		6,023		12,985		4,562
Total	$	156,391	$	65,015	$	128,048	$	49,996

	Six Months Ended
	June 30, 2019				June 30, 2018
(In thousands)	Sales		Gross Profit		Sales		Gross Profit
Network Solutions	$	264,989	$	114,080	$	220,316	$	82,075
Services & Support		35,193		11,547		28,538		7,654
Total	$	300,182	$	125,627	$	248,854	$	89,729

In addition to our reporting segments, we also report revenue for the following three categories – Access & Aggregation, Subscriber Solutions & Experience (formerly Customer Devices) and Traditional & Other Products.

The table below presents sales information by category for the three and six months ended June 30, 2019 and 2018:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2019		2018		2019		2018
Access & Aggregation	$	109,421	$	84,742	$	209,199	$	166,422
Subscriber Solutions & Experience		40,502		34,560		77,255		64,661
Traditional & Other Products		6,468		8,746		13,728		17,771
Total	$	156,391	$	128,048	$	300,182	$	248,854

The following table represents sales information by geographic area for the three and six months ended June 30, 2019 and 2018:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2019		2018		2019		2018
United States	$	75,288	$	68,222	$	147,816	$	130,308
International		81,103		59,826		152,366		118,546
Total	$	156,391	$	128,048	$	300,182	$	248,854