Do you have a list or pictures of older calculators

SOURCE: i need to use a texas instrument calculator TI-30xa for a problem using the power sign

look for a key that has this symbol ^ this is often called a carrot. it's somewhere in the middle and on the right. go 10^21

SOURCE: texas instrument ball 2 plus

Are you talking about TVM calculations? If so, you need to change your payments per year setting (P/Y) from 1 to 12. That should fix it. Hit 2nd, (I/Y), 12 and then ENTER.

SOURCE: how to clear the memory key on Texas instrument

Hello,
Your calculator has 3 memories (M1, M2,M3)
To store the number 170 in M1 use 170[STO]1
To recall a number from M1 use [RCL]1
To add a number to the content of M1 [2nd][SUM]1 (adds displayed value to contents of M1).
[2nd][EXC] 2 exchanges the value already displayed with the contents of M2:

To erase (clear) a memory register, just store 0 in it.

Hope it helps.

SOURCE: Texas Instrument TI-34II problem

Press [2nd] [LOG] to display the menu for logs and exponential functions. Select [LN]. Enter the (positive) number, close the right parenthesis and press [ENTER].

SOURCE: HOW CAN I OBTAIN A MANUAL FOR A TI-5130 TEXAS

TI has this available online at http://education.ti.com/downloads/guidebooks/printer/5320sv/5320sv.pdf