Activist investor Carl Icahn, after abandoning his blogging career in 2009, has joined Twitter.

On Thursday, he posted his first message on the micro-blogging site, maintaining his focus on the PC maker that he has been eyeing for months.

“Twitter is great. I like it almost as much as I like Dell,” he wrote.

Icahn amassed more than 7,100 followers by Friday morning. It remains to be seen whether Michael Dell will also follow the billionaire investor.

Icahn opposes the $24.4 billion buyout led by the Dell founder and Silver Lake Partners, recently urging the company to instead spend up to $16 billion buying shares from investors.

He increased his own Dell stake to about 8% by purchasing half of the shares owned by fellow dissident Southeastern Asset Management. That makes Icahn the second-largest stockholder in Dell, while Michael Dell and related parties own about 16%.

Icahn last tried his hand at high-tech communication in 2008 when he started IcahnReport.com and hired a journalist to help run the site. He made his last entry in April 2009.

Follow Matthew Rocco on Twitter @MatthewRocco