


The Art of Interface 
Article 24Scientific calculator LiLCategory. Professional computing software for PC.
Application. Engineering and scientific calculations.
Description. Feature rich software scientific calculator for PC.
References. Advanced version of this calculator — Librow professional formula calculator. Case study: Librow scientific formula calculator — why and how.
FeaturesScientific calculator LiL is software expression calculator with the following features:
1. Easy to learnLiL calculator is expression calculator, which means it can evaluate the whole expression at once. To evaluate expressions in LiL calculator or program it you are to know book notation, eastern or western, and a couple of keywords. Here they are: Memory (Mem) and Result (Rslt). Use access to current result like:
Store values to memory like:
Use the value in memory like (short notation):
Looks, now you know everything about syntax. 2. ProgrammableIf your calculations are long, sophisticated and multistaged — scientific calculator LiL can manage that for you. Enter all your formulas, use memory for storing results and utilizing them in other formulas, evaluate single formula or all of them at once, run your calculations as script. Here is a primitive script sample, which calculates phase, sets time and evaluates expression as function of phase and time:
Case study. Download script samples
and read this article to study how scripts can help you to organize your calculations. 3. Integrated text processorEnter your formulas from PC keyboard, edit them, insert comments. Your edit window area is limited only by display of your PC. Change the text editor font to your likeness. 4. Statistics supportCalculate mean, variance, standard and average deviations, skewness and kurtosis in one click — put the input data into memory and click St button to evaluate all parameters. Fig. 2. Statistics window.5. File supportSave your work to disk. LiL calculator files have text format, you can edit and create calculations in any text editor and then load into calculator for evaluation. Run your calculation scripts without loading them into the editor. 6. Print supportYou can print your calculations, control how they appear on paper, add header and footer to every page with file data, date, time and page number, set proper margins and preferable fonts. Fig. 3. Page setup dialog.7. Smart keypadYou can hide keypad to maximize display area and work only from PC keyboard. Or you can detach and place it at any comfortable position. Change color, size and appearance to your likeness. Change its notation and set preferences to automatically append functions with opening parenthesis. Fig. 4. Detached Keypad in custom colors.8. Extended memory controlYou can allocate as many memory cells for intermediate results as you need, just provide unique names for them. You can save memory to disk to use results in other calculations. Fig. 5. Memory window.9. Context helpGetting help for any item you can see in LiL calculator is as easy as two clicks — just click the question mark button in toolbar and then click the item of interest — and you will be taken to the page with explanation. Fig. 6. LiL calculator Help.10. Embedded function handbookAs its part LiL calculator help has function handbook, which contains all function definitions, graphs and identities. To access the handbook click the question mark button in toolbar and then click the corresponding function button in keypad — and you will be taken to the handbook function page like “arcsin — trigonometric arc sine function”. Fig. 7. Embedded handbook.Technical dataPrecision: double. Number input/output format: decimal (standard notation) and exponential (scientific notation). Supported operators: addition, subtraction, multiplication, division. Supported functions:
RAM: min 2 MB. Size on disk: application (program) — 1.2 MB, its help — 1.7 MB. Platform: Windows 32bit and 64bit. Implementation: C++. How to evaluate
How to purchaseClick Purchase reference and follow instructions to buy scientific calculator LiL licenses. Every license gives you right to register two installations and generate two keys for them. Second installation is granted as spare one, you can use it for your second PC or notebook. How to registerAs soon as you have bought the license you can generate the key for LiL calculator registration. Attention. Registration ties the software to your PC hardware — make sure you are running LiL calculator on your target platform from your target location when opening Register dialog. It is recommended to select the most reliable hardware for your installation.
Is payment secure?
Money backCondition. Every LiL calculator license gives you right to generate 2 keys. You can request money back only before you have generated the first key. Several licenses. Any unused scientific calculator LiL license can be claimed for money back. For instance, you have bought 2 licenses. If you have generated 1 or 2 keys, the first license is used and the second one could be claimed for money back. How. To request money back go to Money back page of your account. SupportOur scientific calculators have life time support. Any
concerning scientific calculators, please, send to Support@librow.com.


