D. Trend Information  E. Off-Balance Sheet Arrangements  F. Tabular Disclosure of Contractual Obligations  88 As of December 31, 2010, we had remaining commitments under non-cancelable contracts with various  parties, including acquisition of lands and buildings of NT$0.15 billion (US$5.1 million), and acquisition of  telecommunications equipment of NT$15.8 billion (US$543.6 million), and contracts for printing bills, envelopes  and marketing gifts of NT$57 million (US$2.0 million). Light Era Development has already contracted to  advance sale of lands and buildings for NT$2.6 billion (US$89.0 million), and collected the contracted amount  of NT$0.5 billion (US$17.4 million).  (1) Accrued pension liabilities of NT$1.3 billion (US$44.3 million) as of December 31, 2010 have not been  included in the table above.  (2) Operating leases obligations are described in note 31 to our consolidated financial statements included  elsewhere in the annual report.  Set forth below are our total contractual obligations as of December 31, 2010.  Note 30 and 31 to our consolidated financial statements included elsewhere in this annual report provide  descriptions of the pledged assets, and significant commitments and contingencies. There are no off-balance  sheet arrangements that are material to investors.  See “—Overview” for a discussion of the most significant recent trends that have had, and in the future may  have, a material impact on our results of operations, financial condition and capital expenditures. In addition,  see discussions included in this Item for a discussion of known trends, uncertainties, demands, commitments  or events that we believe are reasonably likely to have a material effect on our net operating revenues, income  from continuing operations, profitability, liquidity or capital resources, or that would cause reported financial  information not necessarily to be indicative of future operating results or financial condition.  We have developed a number of advanced network services, operation technologies and applications and  value-added services, including our xDSL/FTTx deployment, internet-based call center, e-commerce platform,  mobile internet services, global standard for mobile communications billing system, a new telecommunications  operation service system for all business units of our company, government public key infrastructure, a leased  line testing and monitoring system and an intelligent transportation system. As of December 31, 2010, we have  been granted 328 domestic patents and 51 foreign patents.  •  customer premises equipment.  PART I Payments due by period Total  Less than  1 year  1-3 years  3-5 years  More than  5 years  (NT$ in billions) Contractual Obligations (1) Short-term loans 0.1  0.1  — — — Short-term bills payable 0.2  0.2  Long-term loans 3.4  0.3  1.5  1.4  0.2  Obligations related to ST-2 satellite 3.5  0.8  0.4  0.4  1.9  Operating leases (2) 5.3  1.6  2.3  1.3  0.1  Total 12.5  3.0  4.2  3.1  2.2 