Powered by strong returns for shares of Salesforce.com Inc. and Microsoft, the Dow Jones Industrial Average is climbing Thursday afternoon. The Dow DJIA, +0.49% is trading 167 points (0.5%) higher, as shares of Salesforce.com Inc. CRM, +2.84% and Microsoft MSFT, +2.43% have contributed about 25% of the blue-chip gauge’s intraday rally. Salesforce.com Inc.’s shares have risen $5.95, or 2.8%, while those of Microsoft have climbed $5.69 (2.4%), combining for a roughly 77-point bump for the Dow. Walt Disney DIS, +1.91%, Visa V, +2.11%, and American Express AXP, +1.77% are also contributing significantly to the gain. A $1 move in any one of the 30 components of the benchmark equates to a 6.58-point swing.