Are we back in the late 1990s? It almost feels like that; some of the most notable initial public offerings (IPOs) recently have come from the tech sector. According to research from IPO specialist Renaissance Capital, they account for one-quarter of the IPOs hitting the market over the past year.Private equity operator Apollo Global Management (NYSE: APO) is apparently gazing in that direction -- it's considering a fresh IPO of its cloud computing management company Rackspace.Continue reading