On a buoyant day for the markets generally, one of today's best performing sectors is technology hardware and equipment. Among the strong performers in the sector is Seeing Machines, a developer of advanced vision based industrial systems, which perked up after it said that a production license for its API tracking software suite has been bought by US firm Pillar Vision.The only sector in the red is real estate investment & services, despite a rise in the share price of DTZ. The global estate agent cut losses sharply last year through buoyant business in Asia and a first operating profit in the Americas.Top performing sectors so far todayChemicals 5,329.80 +3.04%Technology Hardware & Equipment 489.54 +2.71%Forestry & Paper 4,434.57 +2.29%Alternative Energy 4,573.73 +2.23%Construction & Materials 3,183.31 +2.21%Bottom performing sectors so far todayReal Estate Investment & Services 1,374.89 -0.38%