Late last year, Hewlett-Packard split itself into two, believing that smaller was better. Now one of those publicly traded companies is making itself even smaller. Hewlett Packard Enterprise said on Tuesday that it would sell its business that focuses on call centers and maintains networks for clients to the Computer Sciences Corporation in an all-stock deal that would create a new company worth roughly $9 billion. The deal is meant to be the next step in the turnaround of the corporate descendants of Hewlett-Packard, which broke itself apart last fall after years of struggling to turn around its fortunes. The Silicon Valley icon split itself into two smaller companies: HP Enterprise, which focuses on selling hardware like servers to corporate customers, and HP Inc., which specializes in personal computers and printers.