Lenovo ThinkPad T Series devices represent its largest segment of commercial notebook PCs, accounting for an installed operating base of more than 100 million units. Lenovo ThinkPad T Series devices represent its largest segment of commercial notebook PCs, accounting for an installed operating base of more than 100 million units. Lenovo ThinkPad T Series devices represent its largest segment of commercial notebook PCs, accounting for an installed operating base of more than 100 million units. Lenovo ThinkPad T Series devices represent its largest segment of commercial notebook PCs, accounting for an installed operating base of more than 100 million units. Lenovo ThinkPad T Series devices represent its largest segment of commercial notebook PCs, accounting for an installed operating base of more than 100 million units.