Victor Dellovo
Analyst · Sergen Investments -- excuse me, Segren Investments
Thanks, Gary.
Let's move into our segment review, starting with the High-Performance Product division. HPP revenues were $2 million, down 18.1% from last year due to softer sales of our multicomputer and legacy Myricom products and the delay in the launch of our ARIA SDS cybersecurity platform.
Multicomputer revenues were mainly for spare parts and boards for each of the U.S. and foreign military programs. We continue to have limited visibility related to the order levels for 2019, but we are expecting most of our royalties to be related to the E-2D foreign military program, which will be recorded in the back half of fiscal year.
There were 3 factors that negatively affected our legacy Myricom ARC Series product sales in Q1. First, we had a very strong sales quarter in Q4, and we believe that there was some pull-in from the sales from Q1. The government shutdown also slightly affected sales as orders ceased from the government sector in the second half of December. And finally, we had some timing issues on the repair side of the business as some larger repair projects extended into Q2. Looking at Q2, we expect stabilized revenues from the repair business, but we are optimistic that our Myricom business will get back to normal levels.
During the quarter, we continued to develop new software features for our legacy ARC Series 10-gig network adapters and worked with equipment manufacturers to integrate our technology into their own. As part of the effort, we launched our Myricom Secure Intelligent Adapter, or SIA, which allows manufacturers to offload advanced security capabilities onto a card, reduce equipment costs and accelerate security functions like data encryption, compression, packet capture and classifications. We believe this will generate demand from application developers and expand the customer base for our Myricom products.
Let's move on to the update about our award-winning next-generation cybersecurity platform, ARIA. ARIA provides advanced cybersecurity protection capabilities for critical data assets that need to be accessed by end users in applications, both in the cloud and on-prem. During the quarter, we continued to invest heavily to develop a software platform to support different security applications. As a result, we recently announced ARIA Packet Intelligence application, which enhances ARIA's ability to detect network-born threats. With this software, ARIA can monitor data feeds, packet streams and conversations, improve data detection tools' capabilities and even block infiltrating of data from a network. This new capability can prevent as much as 80% of the threats occurring in the network environments. By developing these capabilities, we continue to take radically different approach to enterprise-wide data security by focusing on enhancing network security and ensuring application data impenetrability.
We recently received the first batch of ARIA boards from our suppliers and are in the middle of evaluations with 4 customers. We expect to continue conducting testing and evaluations in Q2 and early Q3, and we should see sales beginning to ramp up in the second half of fiscal 2019.
Turning now to our Technology Solution business. Quarterly revenues were up 19.7% year-over-year, mainly due to strong sales in the U.S. As we discussed in the past, we rightsized the U.K. business by adjusting headcount and reducing fixed costs. As a result, this business was profitable in Q1 as we served our long-term multinational customers. Our team continues to work on booking new projects, and we expect a positive contribution from the U.K. office during 2019.
In the U.S., we had an excellent quarter driven by the growth of our managed IT services and the wireless practice. We are adding new and larger clients and establishing higher bill rates across our customer base. During the quarter, we also benefited from the announcement of tariffs on electronics, which prompted several of our customers to book contracts in advance of the new year. We completed wireless installments on 6 cruise ships and leveraged our capabilities in the area to sign a new, large international retail customer.
In closing, we are working hard to transform CSPi from a company-focused on defense-related multicomputers to one with significant growth opportunities in the cybersecurity and wireless and managed service markets. We have executed well in controlling costs and positioning our business for growth. We are developing new cybersecurity applications for our legacy products, and we are encouraged that we are getting closer to the launch of our next-generation platform for cybersecurity products. In the coming quarters, we will continue to invest in engineering talent while managing costs to deliver profitability. We look forward to keeping you up-to-date on our transformation progress.
With that, I'll turn it over to the operator to take your questions.