Part I — Definition of Gross Income, Adjusted Gross Income, Taxable Income, Etc. (Sections 61 to 68)
Part II — Items Specifically Included In Gross Income (Sections 72 to 91)
Part III — Items Specifically Excluded From Gross Income (Sections 101 to 140)
Part IV — Tax Exemption Requirements for State and Local Bonds (Sections 141 to 150)
Part V — Deductions for Personal Exemptions (Sections 151 to 153)
Part VI — Itemized Deductions for Individuals and Corporations (Sections 161 to 199A)
Part VII — Additional Itemized Deductions for Individuals (Sections 211 to 224)
Part VIII — Special Deductions for Corporations (Sections 241 to 250)
Part IX — Items not Deductible (Sections 261 to 280H)
Part X — Terminal Railroad Corporations and Their Shareholders (Section 281)
Part XI — Special Rules Relating to Corporate Preference Items (Section 291)