One of the hottest industries today also happens to be under invested, CNBC's Jim Cramer said Monday.
So what's the industry? Data storage devices: those technology companies that make hard disk drives, servers, mainframes and other things that go inside personal computers.
"This group is where the action is and I gotta tell ya, people are still under invested in what I regard as being 'old tech,'" said Cramer on "Squawk on the Street."
Given the advent of cloud computing, in which data is managed and stored on a network of remote servers instead of on a personal computer, the data storage devices industry might seem a little old fashioned.
But for whatever reason, "old tech" has picked up steam lately.
Intel, which will post earnings on Tuesday, had earlier pre-announced to the upside. Historically, "big blue" has not pre-announced earnings unless the company could beat the pre-announcement, Cramer said.
"I look for Intel to go higher. Old tech is doing so well," he said. "If it's in a PC, it's going higher."
—By CNBC's Drew Sandholm.
DISCLOSURE: When this story was published, Cramer's charitable trust did not own Intel, Seagate Technology, or Western Digital.