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A Free Newsletter for Users of the HP95LX/100LX/200LX

In this issue: 
---What's a Subset Good For?
---How to Exploit HP Calc's Custom Application

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What's a Subset Good For?
The Subset option lets you look at a small part of any database application (PhoneBook, DataBase, NoteTaker, WorldTime). 

You can make a subset definition as complex as you need. This is done by filling out more than one field and/or including more than one possible entry in a field.

For example, if you wanted to create a PhoneBook subset of business contacts in the 415 phone area code (San Francisco area) you could Press the F6 Function key then press the F2 (Define) key, tab to the Business Phone field of the Define Subset screen and enter 415. Then Tab to the Category field and select Business (assuming you have predefined Business as a category). Press F10, give the subset a name and press F10 again. 

To select a subset, open PhoneBook, press F6, select the subset you created and press F10. Only the desired entries will be displayed.

Subsets are more useful for those who keep large databases and PhoneBooks. It reduces the field of possible entries and makes searches faster.

As mentioned above, you can specify more than one possible match for a given field by separating the possibilities with a comma. In the example above, we could create a subset to select phone numbers in the San Francisco and Palo Alto are by entering 415,408 in the Business phone field of the Subset Define screen. In this case the comma stands for the word "or" as in "either this or that."

Entries preceded by a hyphen will be excluded from the subset. If you want to specify a range of numbers they can be preceded by the symbols <, >, =, <=, >=, or <> If you want to specify a criterion that could appear in any field, then precede it with an asterisk.

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How to Exploit HP Calc's Custom Application

Open HP Calc to the Arithmetic application and take a look at the labels at the bottom of the screen and you'll see a feature that goes unnoticed by some. Some of HP Calcs more useful functions are associated with the function keys. For example, if you want to go to the Solver application, all you have to do is press F5.

Another feature that goes unnoticed by many is HP Calc's Custom application. This lets you decide which HP Calc applications are associated with which function key. Heres how it works.

Open HP Calc and press MENU, Options, Custom Application. You'll see the Set Custom Application keys setup screen.

Press the tab key to move between the function keys and when you get to one you would like to change, press the Up and Down Arrow keys to cycle through the different applications and mathematics functions, or type the first letter of the application name.

After you have made all the changes you want press F10 for OK. Whenever you open the HP Calc Custom application, the function key changes you just made will be listed at the bottom of the display

You can also set up HP Calc to display this Custom application screen every time you start HP Calc. Press MENU Options Startup Application, select Custom from the list and press F10. Every time you start HP Calc the Custom screen will show your version of HP Calc.


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