Wayne, PA., March 25, 2022 —21^st Century Software today announced its first version of the VSE operating system (OS)—which enters the market under the name: VSEⁿ V6.3 with planned availability for May 17, 2022. VSEⁿ is designed to offer non-disruptive compatibility with previous versions of IBM z/VSE (which serves as the basis for VSEⁿ V6.3), leveraging the source code license agreement the company completed on June 1, 2021. VSEⁿ V6.3 also addresses fixes and functionality that had been applied to IBM z/VSE 6.2 through March 2022, along with the newest releases of the TCP/IP stacks and installation enhancements. “21^st Century Software, through deep customer and market insight, gives CIOs and IT leaders greater control and the ability to derive increased value in their IBM Z infrastructure while aiming to reduce the dependence on specialized IBM Z skills,” said Rebecca Levesque, CEO and President, 21^st Century Software. “We recognize that organizations using IBM z/VSE value the business-critical data in their systems. VSEⁿ maintains the viability of the operating system’s role in the data center of the future.” Middleware stack names have also changed as reflected in the company’s marketing materials, documentation, panels, and messages, but executables (commands, jobs, APIs) have not been renamed to maintain compatibility for customers coming from IBM z/VSE. Here’s a look at the new names 21^st Century Software is delivering initially across the stack, with more to come:

IBM Product Name	Corresponding 21st Century Software Offering
z/VSE	VSEn
CICS, CICS TS	OLTP for VSEn or OLTP
VTAM	VCDD for VSEn or VCDD
HLASM	HLASM for VSEn or HLASM
EREP	IDRP for VSEn or IDRP
IBM IPv6/VSE	21CSW IPv6/VSE
IBM TCP/IP for z/VSE	21CSW TCP/IP for VSEn
DL/I	HDB for VSEn or HDB

The rest of the 21^st Century VSEⁿ stack will be provided in the coming months. VSEⁿ has been designed to interoperate with current versions of those IBM z/VSE middleware stack products not yet included in the table above, as well as other ISV VSE products, so customers can move to VSEⁿ and leverage their investments right away. The 21^st Century Software VSEⁿ team, led by Gonzalo Muelas Serrano, VP Research and Development for VSEⁿ, will continue to work closely with IBM to ensure alignment with current and future strategies. For example, 21^st Century Software intends to provide:

• Support for new generations of IBM Z hardware

• Enablement for VSEⁿ also as a public cloud offering, aligning with customer needs and IBM’s evolving hybrid cloud strategy

21^st Century Software is also working with active VSE vendors interested in investing in and strengthening the VSE ecosystem in key areas like security, storage, resiliency, observability, and connectivity. These vendors include:

• Barnard Systems Inc.

• B.O.S. Software Service und Vertrieb GmbH

• Broadcom Mainframe Software

• CSI International

• Lattwein GmbH

• MacKinney Systems, Inc.

• Velocity Software, Inc.

• XPS Software GmbH

“Barnard Software, Inc. looks forward to working with 21^st Century Software as they move VSEⁿ into the future.”

“We are excited to see the investment and growth in the VSE ecosystem. Broadcom’s commitment to our customers is paramount and we will support 21^st Century Software VSEⁿ as we continue to invest in our solutions, including new ESM capabilities on the horizon.” Greg Lotko, senior vice president and general manager, Mainframe Software Division, Broadcom.

“CSI International is thrilled to partner with 21^st Century Software and continue to strengthen the VSE ecosystem. We anticipate great things to come.” Barry Boyer, CEO, CSI International.

“As the industry leader in z/VM and Linux on Z performance management we, at Velocity Software, have enhanced our z/VSE monitoring capabilities to meet customer requirements and we are excited to be working with 21^st Century Software to support VSEⁿ and the VSE community and ecosystem.” – Magnelia Necoy, Managing Director, Velocity Software Inc.

Continuous innovation also means investing in the right talent and expertise. 21^st Century Software has developed a sustainable team of seasoned VSE experts who work closely with new, innovative developers. Together, the team is prepared to effectively maintain and improve upon the OS and middleware stack well into the future. “21^st Century Software is excited to continue helping loyal VSE customers worldwide, for whom this platform has been so critical,” said Gonzalo Muelas Serrano. “These customers have stayed with VSE because of the value that it brings, and we intend to continue investing in and raising that value.” To learn more about why VSEⁿ provides the business value you need, or if you are looking for career opportunities and want to join 21^st Century Software’s team of VSEⁿ experts, reach out to Gonzalo Muelas Serrano at gonzalom@21cs.com About 21^st Century Software 21^st Century Software is a leader in the development of mainframe software solutions, linking the past to the future in support of the mainframe ecosystem. Learn more at https://www.21cs.com/.