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 Commands:
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    NEW     - clear the current session and start a new one;
    OPEN    - open a stored problem from the disk;
    SAVE    - save the current problem to the disk;
    LIST    - list the available problems on the disk;
    EXIT    - close the program;
    RESET   - clear the output and re-calculate everything from the start;
    CLS     - clear the output and continue from the last line;
    DEL     - delete the last line;
    DEG     - set default trigonometric units to degrees;
    RAD     - set default trigonometric units to radians;
    GRA     - set default trigonometric units to grades;
    SETTINGS/OPTIONS - display the settings file for editing; 
    LICENSE - display the license file;
    HELP    - show this help file.

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 Operators: ! ^ / ÷ \ % * - + ≡ ≠ < > ≤ ≥ ∧ ∨ ⊕ = ← ? (input field)
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 Custom functions: f(x; y; z…) = expression
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 Functions:
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    sin(x)     cos(x)     tan(x)      csc(x)      sec(x)         cot(x)
    asin(x)    acos(x)    atan(x)     acsc(x)     asec(x)        acot(x)
    sinh(x)    cosh(x)    tanh(x)     csch(x)     sech(x)        coth(x)
    asinh(x)   acosh(x)   atanh(x)    acsch(x)    asech(x)       acoth(x)
    log(x)     ln(x)      log_2(x)    exp(x)
    sqr(x)     sqrt(x)    cbrt(x)     root(x; n)  random(x)      getunits(x)
    round(x)   floor(x)   ceiling(x)  trunc(x)    hp(x)          settunits(x; u)
    sign(x)    mod(x; y)  gcd(x; y)   lcm(x; y)   ishp(x)        clrtunits(x)
    re(z)      im(z)      abs(z)      phase(z)    conj(z)        atan2(x; y)
    and(x; y; z…)         or(x; y; z…)            xor(x; y; z…)  not(x)        
    min(x; y; z…)         max(x; y; z…)
    sum(x; y; z…)         average(x; y; z…)       sumsq(x; y; z…)
    product(x; y; z…)     mean(x; y; z…)          srss(x; y; z…)
    if(cond; val-if-true; val-if-false)
    switch(cond1; val1; cond2; val2; …; default)
    take(n; a; b; c…)     line(x; a; b; c…)       spline(x; a; b; c…)

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 Vector functions:
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    Creational:           Creational hp: 
    vector(n)             vector_hp(n) 
    range(x1; xn; s)      range_hp(x1; xn; s)
    
    Structural:           Math:           Data:               search(v; x; i)
    len(v)                norm_1(v)       sort(v)             rsort(v)
    size(v)               norm(v)         order(v)            revorder(v)
    resize(v; n)          norm_2(v)       reverse(v)          count(v; x; i)
    fill(v; x)            norm_e(v)       find(v; x; i)       lookup(a; b; x)
    join(a; b; c…)        norm_p(v; p)    find_eq(v; x; i)    lookup_eq(a; b; x)
    slice(v; i1; i2)      norm_i(v)       find_ne(v; x; i)    lookup_ne(a; b; x)                       
    first(v; n)           unit(v)         find_lt(v; x; i)    lookup_lt(a; b; x)
    last(v; n)            dot(a; b)       find_le(v; x; i)    lookup_le(a; b; x)
    extract(v; i)         cross(a; b)     find_gt(v; x; i)    lookup_gt(a; b; x)
                                          find_ge(v; x; i)    lookup_ge(a; b; x)
	
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 Matrix functions:
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    Creational:                  Creational hp:         column_hp(m; c)  
    matrix(m; n)                 matrix_hp(m; n)        utriang_hp(n)    
    identity(n)                  identity_hp(n)         ltriang_hp(n)    
    diagonal(n; d)               diagonal_hp(n; d)      symmetric_hp(n)  
    column(m; c)                  
    utriang(n)                   Math:                  Data:                    
    ltriang(n)                   hprod(A; B)            sort_cols(M; i)  
    symmetric(n)                 fprod(A; B)            rsort_cols(M; i) 
    vec2diag(v)                  kprod(A; B)            sort_rows(M; j) 
    vec2row(v)                   mnorm(M)              	
    vec2col(v)                   mnorm_e(M)             rsort_rows(M; j) 
    join_cols(c1; c2; c3…)       mnorm_1(M)             order_cols(M; i) 
    join_rows(r1; r2; r3…)       mnorm_2(M)             revorder_cols(M; i) 
    augment(A; B; C…)            mnorm_i(M)             order_rows(M; j) 
    stack(A; B; C…)              cond(M)                revorder_rows(M; j) 
	                             cond_e(M)              mcount(M; x) 
    Structural:                  cond_1(M)              msearch(M; x; i; j) 
    n_rows(M)                    cond_2(M)              mfind(M; x) 
    n_cols(M)                    cond_i(M)              mfind_eq(M; x) 
    resize(M; m; n)              det(M)                 mfind_ne(M; x) 
    fill(M; x)                   rank(M)                mfind_lt(M; x) 
    fill_row(M; i; x)            trace(M)               mfind_le(M; x) 
    fill_col(M; j; x)            transp(M)              mfind_gt(M; x) 
    copy(A; B; i; j)             adj(M)                 mfind_ge(M; x) 
    add(A; B; i; j)              cofactor(M)            hlookup(M; x; i1; i2)    
    row(M; i)                    eigenvals(M; ne)       hlookup_eq(M; x; i1; i2) 
    col(M; j)                    eigenvecs(M; ne)       hlookup_ne(M; x; i1; i2) 
    extract_rows(M; i)           cholesky(M; ne)        hlookup_lt(M; x; i1; i2) 
    extract_cols(M; j)           lu(M)                  hlookup_le(M; x; i1; i2) 
    diag2vec(v)                  qr(M)                  hlookup_gt(M; x; i1; i2) 
    col(M; j)                    svd(M)                 hlookup_ge(M; x; i1; i2) 
    extract_rows(M; i)           inverse(M)             vlookup(M; x; j1; j2)    
    extract_cols(M; j)           lsolve(A; b)           vlookup_eq(M; x; j1; j2) 
    diag2vec(v)                  clsolve(A; b)          vlookup_ne(M; x; j1; j2) 
    submatrix(M; i1; i2; j1; j2) slolve(A; B)           vlookup_lt(M; x; j1; j2) 
                                 csolve(A; B)           vlookup_le(M; x; j1; j2) 
    Double interpolation:        cmsolve(A; B)          vlookup_gt(M; x; j1; j2) 
    take(x; y; M)	             smsolve(A; B)          vlookup_ge(M; x; j1; j2) 
    line(x; y; M)                matmul(A; B)           
    spline(x; y; M)				 ift(M), fft(M)

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 Iterative and numerical methods:
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    $Root{f(x) = const @ x = a : b}     $Derivative{f(x) @ x = a}
    $Root{f(x) @ x = a : b}             $Sum{f(k) @ k = a : b}
    $Find{f(x) @ x = a : b}             $Product{f(k) @ k = a : b}
    $Sup{f(x) @ x = a : b}              $Repeat{f(k) @ k = a : b}
    $Inf{f(x) @ x = a : b}              $While{condition; expressions}
    $Area{f(x) @ x = a : b}             $Block{expressions}
    $Integral{f(x) @ x = a : b}         $Inline{expressions}
    $Slope{f(x) @ x = a}                Precision
    
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 Units of measurement:
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    Dimensionless:           % ‰ ‱ pcm ppm ppb ppt ppq
    Angles:                  ° ′ ″ deg rad grad rev
    
    Metric (SI and compatible):
        Mass:                g hg kg t kt Mt Gt dg cg mg μg Da u
        Length:              m km dm cm mm μm nm pm AU ly
        Time:                s ms μs ns ps min h d w y
        Frequency:           Hz kHz MHz GHz THz mHz μHz nHz pHz rpm
        Speed:               kmh
        Electric current:    A kA MA GA TA mA μA nA pA
        Temperature:         °C Δ°C K
        Amount of substance: mol
        Luminous intensity:  cd
        Area:                a daa ha
        Volume:              L daL hL dL cL mL μL nL pL
        Force:               N daN hN kN MN GN TN gf kgf tf dyn
        Moment:              Nm kNm
        Pressure:            Pa daPa hPa kPa MPa GPa TPa dPa cPa mPa μPa nPa pPa
                             bar mbar μbar atm at Torr mmHg
        Viscosity:           P cP St cSt
        Energy work:         J   kJ   MJ   GJ   TJ   mJ   μJ   nJ   pJ
                             Wh  kWh  MWh  GWh  TWh  mWh  μWh  nWh  pWh
                             eV  keV  MeV  GeV  TeV  PeV  EeV  cal  kcal erg 
        Power:               W   kW   MW   GW   TW   mW   μW   nW   pW   hpM  ks
                             VA  kVA  MVA  GVA  TVA  mVA  μVA  nVA  pVA
                             VAR kVAR MVAR GVAR TVAR mVAR μVAR nVAR pVAR
        Electric charge:     C   kC   MC   GC   TC   mC   μC   nC   pC   Ah   mAh
        Potential:           V   kV   MV   GV   TV   mV   μV   nV   pV
        Capacitance:         F   kF   MF   GF   TF   mF   μF   nF   pF
        Resistance:          Ω   kΩ   MΩ   GΩ   TΩ   mΩ   μΩ   nΩ   pΩ
        Conductance:         S   kS   MS   GS   TS   mS   μS   nS   pS 
                             ℧   k℧   M℧   G℧   T℧   m℧   μ℧   n℧   p℧
        Magnetic flux:       Wb  kWb  MWb  GWb  TWb  mWb  μWb  nWb  pWb
        Magn. flux density:  T   kT   MT   GT   TT   mT   μT   nT   pT
        Inductance:          H   kH   MH   GH   TH   mH   μH   nH   pH
        Luminous flux:       lm
        Illuminance:         lx
        Radioactivity:       Bq  kBq  MBq  GBq  TBq  mBq  μBq  nBq  pBq  Ci Rd
        Absorbed dose:       Gy  kGy  MGy  GGy  TGy  mGy  μGy  nGy  pGy
        Equivalent dose:     Sv  kSv  MSv  GSv  TSv  mSv  μSv  nSv  pSv
        Catalytic activity:  kat
        
    Non-metric (Imperial/US):
        Mass:          gr dr oz lb (lbm, lb_m) kipm (kip_m) st qr 
                       cwt (cwt_UK, cwt_US) ton (ton_UK, ton_US) slug
        Length:        th in ft yd ch fur mi ftm (ftm_UK, ftm_US)
                       cable (cable_UK, cable_US) nmi li rod pole perch lea
        Speed:         mph knot
        Temperature:   °F Δ°F °R
        Area:          rood ac
        Volume, fluid: fl_oz     gi      pt     qt     gal     bbl   
                       fl_oz_UK  gi_UK   pt_UK  qt_UK  gal_UK  bbl_UK
                       fl_oz_US  gi_US   pt_US  qt_US  gal_US  bbl_US
        Volume, dry:                     pt_dry qt_dry gal_dry bbl_dry
                       pk (pk_UK, pk_US) bu (bu_UK, bu_US)
        Force:         ozf (oz_f) lbf (lb_f) kip (kipf, kip_f) tonf (ton_f) pdl
        Pressure:      osi osf psi psf ksi ksf tsi tsf inHg
        Energy/work:   BTU therm (therm_UK, therm_US) quad
        Power:         hp hpE hpS

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 Special symbol conversion table:
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(add apostrophe ` before the respective latin letter)

Fr: `a `b `c `d `e `f `g `h `i `j `k `l `m `n `o `p `q `r `s `t `u `v `w `x `y `z 
To:  α  β  χ  δ  ε  φ  γ  η  ι  ø  κ  λ  μ  ν  ο  π  θ  ρ  σ  τ  υ  ϑ  ω  ξ  ψ  ζ

Fr: `A `B `C `D `E `F `G `H `I `J `K `L `M `N `O `P `Q `R `S `T `U `V `W `X `Y `Z 
To:  Α  Β  Χ  Δ  Ε  Φ  Γ  Η  Ι  Ø  Κ  Λ  Μ  Ν  Ο  Π  Θ  Ρ  Σ  Τ  Υ  ∡  Ω  Ξ  Ψ  Ζ

Fr: `@ `' (single quote) `" (double quote)
To:  °  ′ (single prime)  ″ (double prime/second)

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 Command line options (support the same language features as Calcpad.exe):
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    cli input.cpd output.html - calculates input.cpd and exports 
    cli input.cpd output.docx   the results to the respective format
    cli input.cpd output.pdf    (html, docx or pdf);
        
    cli input.cpd html - calculates input.cpd and exports to input.html;
    cli input.cpd docx - calculates input.cpd and exports to input.docx;    
    cli input.cpd pdf  - calculates input.cpd and exports to input.pdf;
    
    cli input.cpd      - calculates input.cpd and exports to input.html.
    
    Additional arguments:
        -s              - silent mode (do not open the output file), e.g.:
        cli input.cpd output.html -s